mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-26 11:41:09 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/subprojects/gst-plugins-base/gst-libs/gst/pbutils/codec-utils.c
Philippe Normand 986a36273f pbutils: Don't include default vp9 parameters in resulting codec mime string 
According to the document defining the vp9 codec string, the optional fields
should all be present only if at least one of them has a non-default value.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5716>
2023-11-27 10:36:01 +00:00

2886 lines
84 KiB
C
Raw Blame History

/* GStreamer base utils library codec-specific utility functions
* Copyright (C) 2010 Arun Raghavan <arun.raghavan@collabora.co.uk>
* 2013 Sreerenj Balachandran <sreerenj.balachandran@intel.com>
* 2010 Collabora Multimedia
* 2010 Nokia Corporation
* 2013 Intel Corporation
* 2015 Sebastian Dröge <sebastian@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gstpbutilscodecutils
* @title: Codec utilities
* @short_description: Miscellaneous codec-specific utility functions
*
* Provides codec-specific ulility functions such as functions to provide the
* codec profile and level in human-readable string form from header data.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "pbutils.h"
#include <gst/base/base.h>
#include <gst/base/gstbitreader.h>
#include <gst/tag/tag.h>
#include <string.h>
#ifndef GST_DISABLE_GST_DEBUG
#define GST_CAT_DEFAULT gst_pb_utils_codec_utils_ensure_debug_category()
static GstDebugCategory *
gst_pb_utils_codec_utils_ensure_debug_category (void)
{
static gsize cat_gonce = 0;
if (g_once_init_enter (&cat_gonce)) {
GstDebugCategory *cat = NULL;
GST_DEBUG_CATEGORY_INIT (cat, "codec-utils", 0,
"GstPbUtils codec helper functions");
g_once_init_leave (&cat_gonce, (gsize) cat);
}
return (GstDebugCategory *) cat_gonce;
}
#endif /* GST_DISABLE_GST_DEBUG */
#define GST_SIMPLE_CAPS_HAS_NAME(caps,name) \
gst_structure_has_name(gst_caps_get_structure((caps),0),(name))
#define GST_SIMPLE_CAPS_HAS_FIELD(caps,field) \
gst_structure_has_field(gst_caps_get_structure((caps),0),(field))
static const guint aac_sample_rates[] = { 96000, 88200, 64000, 48000, 44100,
32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350
};
static const gchar *
digit_to_string (guint digit)
{
static const char itoa[][2] = {
"0", "1", "2", "3", "4", "5", "6", "7", "8", "9"
};
if (G_LIKELY (digit < 10))
return itoa[digit];
else
return NULL;
}
/**
* gst_codec_utils_aac_get_sample_rate_from_index:
* @sr_idx: Sample rate index as from the AudioSpecificConfig (MPEG-4
* container) or ADTS frame header
*
* Translates the sample rate index found in AAC headers to the actual sample
* rate.
*
* Returns: The sample rate if @sr_idx is valid, 0 otherwise.
*/
guint
gst_codec_utils_aac_get_sample_rate_from_index (guint sr_idx)
{
if (G_LIKELY (sr_idx < G_N_ELEMENTS (aac_sample_rates)))
return aac_sample_rates[sr_idx];
GST_WARNING ("Invalid sample rate index %u", sr_idx);
return 0;
}
/**
* gst_codec_utils_aac_get_index_from_sample_rate:
* @rate: Sample rate
*
* Translates the sample rate to the index corresponding to it in AAC spec.
*
* Returns: The AAC index for this sample rate, -1 if the rate is not a
* valid AAC sample rate.
*/
gint
gst_codec_utils_aac_get_index_from_sample_rate (guint rate)
{
guint n;
for (n = 0; n < G_N_ELEMENTS (aac_sample_rates); n++)
if (aac_sample_rates[n] == rate)
return n;
GST_WARNING ("Invalid sample rate %u", rate);
return -1;
}
static gboolean
gst_codec_utils_aac_get_audio_object_type (GstBitReader * br,
guint8 * audio_object_type)
{
guint8 aot;
if (!gst_bit_reader_get_bits_uint8 (br, &aot, 5))
return FALSE;
if (aot == 31) {
if (!gst_bit_reader_get_bits_uint8 (br, &aot, 6))
return FALSE;
aot += 32;
}
*audio_object_type = aot;
return TRUE;
}
static gboolean
gst_codec_utils_aac_get_audio_sample_rate (GstBitReader * br,
guint * sample_rate)
{
guint8 sampling_freq_index;
guint32 sampling_rate;
if (!gst_bit_reader_get_bits_uint8 (br, &sampling_freq_index, 4))
return FALSE;
if (sampling_freq_index == 0xf) {
if (!gst_bit_reader_get_bits_uint32 (br, &sampling_rate, 24))
return FALSE;
} else {
sampling_rate =
gst_codec_utils_aac_get_sample_rate_from_index (sampling_freq_index);
if (!sampling_rate)
return FALSE;
}
*sample_rate = sampling_rate;
return TRUE;
}
static gboolean
gst_codec_utils_aac_get_audio_object_type_full (GstBitReader * br,
guint8 * audio_object_type, guint8 * channel_config, guint * sample_rate)
{
guint8 aot, channels;
guint rate;
if (!gst_codec_utils_aac_get_audio_object_type (br, &aot))
return FALSE;
if (!gst_codec_utils_aac_get_audio_sample_rate (br, &rate))
return FALSE;
if (!gst_bit_reader_get_bits_uint8 (br, &channels, 4))
return FALSE;
/* 5 indicates SBR extension (i.e. HE-AAC) */
/* 29 indicates PS extension */
if (aot == 5 || aot == 29) {
if (!gst_codec_utils_aac_get_audio_sample_rate (br, &rate))
return FALSE;
if (!gst_codec_utils_aac_get_audio_object_type (br, &aot))
return FALSE;
}
*audio_object_type = aot;
*sample_rate = rate;
*channel_config = channels;
return TRUE;
}
/**
* gst_codec_utils_aac_get_sample_rate:
* @audio_config: (array length=len): a pointer to the AudioSpecificConfig
* as specified in the Elementary Stream Descriptor (esds)
* in ISO/IEC 14496-1.
* @len: Length of @audio_config
*
* Translates the sample rate index found in AAC headers to the actual sample
* rate.
*
* Returns: The sample rate if sr_idx is valid, 0 otherwise.
*
* Since: 1.10
*/
guint
gst_codec_utils_aac_get_sample_rate (const guint8 * audio_config, guint len)
{
guint sample_rate = 0;
guint8 audio_object_type = 0, channel_config = 0;
GstBitReader br = GST_BIT_READER_INIT (audio_config, len);
if (len < 2)
return 0;
gst_codec_utils_aac_get_audio_object_type_full (&br, &audio_object_type,
&channel_config, &sample_rate);
return sample_rate;
}
/**
* gst_codec_utils_aac_get_channels:
* @audio_config: (array length=len): a pointer to the AudioSpecificConfig
* as specified in the Elementary Stream Descriptor (esds)
* in ISO/IEC 14496-1.
* @len: Length of @audio_config in bytes
*
* Returns the channels of the given AAC stream.
*
* Returns: The channels or 0 if the channel could not be determined.
*
* Since: 1.10
*/
guint
gst_codec_utils_aac_get_channels (const guint8 * audio_config, guint len)
{
guint channels;
if (len < 2)
return 0;
channels = (audio_config[1] & 0x7f) >> 3;
if (channels > 0 && channels < 7)
return channels;
else if (channels == 7)
return 8;
else
return 0;
}
/**
* gst_codec_utils_aac_get_profile:
* @audio_config: (array length=len): a pointer to the AudioSpecificConfig
* as specified in the Elementary Stream Descriptor (esds)
* in ISO/IEC 14496-1.
* @len: Length of @audio_config in bytes
*
* Returns the profile of the given AAC stream as a string. The profile is
* normally determined using the AudioObjectType field which is in the first
* 5 bits of @audio_config
*
* Returns: (nullable): The profile as a const string and %NULL if the profile could not be
* determined.
*/
const gchar *
gst_codec_utils_aac_get_profile (const guint8 * audio_config, guint len)
{
const gchar *profile = NULL;
guint sample_rate;
guint8 audio_object_type, channel_config;
GstBitReader br = GST_BIT_READER_INIT (audio_config, len);
if (len < 1)
return NULL;
GST_MEMDUMP ("audio config", audio_config, len);
if (!gst_codec_utils_aac_get_audio_object_type_full (&br, &audio_object_type,
&channel_config, &sample_rate)) {
return NULL;
}
switch (audio_object_type) {
case 1:
profile = "main";
break;
case 2:
profile = "lc";
break;
case 3:
profile = "ssr";
break;
case 4:
profile = "ltp";
break;
default:
GST_DEBUG ("Invalid profile idx: %u", audio_object_type);
break;
}
return profile;
}
/**
* gst_codec_utils_aac_get_level:
* @audio_config: (array length=len): a pointer to the AudioSpecificConfig
* as specified in the Elementary Stream Descriptor (esds)
* in ISO/IEC 14496-1.
* @len: Length of @audio_config in bytes
*
* Determines the level of a stream as defined in ISO/IEC 14496-3. For AAC LC
* streams, the constraints from the AAC audio profile are applied. For AAC
* Main, LTP, SSR and others, the Main profile is used.
*
* The @audio_config parameter follows the following format, starting from the
* most significant bit of the first byte:
*
* * Bit 0:4 contains the AudioObjectType (if this is 0x5, then the
* real AudioObjectType is carried after the rate and channel data)
* * Bit 5:8 contains the sample frequency index (if this is 0xf, then the
* next 24 bits define the actual sample frequency, and subsequent
* fields are appropriately shifted).
* * Bit 9:12 contains the channel configuration
*
* Returns: (nullable): The level as a const string and %NULL if the level could not be
* determined.
*/
const gchar *
gst_codec_utils_aac_get_level (const guint8 * audio_config, guint len)
{
guint8 audio_object_type = 0xFF, channel_config = 0xFF;
guint rate;
/* Number of single channel elements, channel pair elements, low frequency
* elements, independently switched coupling channel elements, and
* dependently switched coupling channel elements.
*
* Note: The 2 CCE types are ignored for now as they require us to actually
* parse the first frame, and they are rarely found in actual streams.
*/
int num_sce = 0, num_cpe = 0, num_lfe = 0, num_cce_indep = 0, num_cce_dep = 0;
int num_channels;
/* Processor and RAM Complexity Units (calculated and "reference" for single
* channel) */
int pcu = -1, rcu = -1, pcu_ref, rcu_ref;
int ret = -1;
GstBitReader br = GST_BIT_READER_INIT (audio_config, len);
g_return_val_if_fail (audio_config != NULL, NULL);
if (len < 2)
return NULL;
GST_MEMDUMP ("audio config", audio_config, len);
if (!gst_codec_utils_aac_get_audio_object_type_full (&br, &audio_object_type,
&channel_config, &rate)) {
return NULL;
}
switch (channel_config) {
case 0:
/* Channel config is defined in the AudioObjectType's SpecificConfig,
* which requires some amount of digging through the headers. I only see
* this done in the MPEG conformance streams - FIXME */
GST_WARNING ("Found a stream with channel configuration in the "
"AudioSpecificConfig. Please file a bug with a link to the media if "
"possible.");
return NULL;
case 1:
/* front center */
num_sce = 1;
break;
case 2:
/* front left and right */
num_cpe = 1;
break;
case 3:
/* front left, right, and center */
num_sce = 1;
num_cpe = 1;
break;
case 4:
/* front left, right, and center; rear surround */
num_sce = 2;
num_cpe = 1;
break;
case 5:
/* front left, right, and center; rear left and right surround */
num_sce = 1;
num_cpe = 2;
break;
case 6:
/* front left, right, center and LFE; rear left and right surround */
num_sce = 1;
num_cpe = 2;
break;
case 7:
case 12:
case 14:
/* front left, right, center and LFE; outside front left and right;
* rear left and right surround */
num_sce = 1;
num_cpe = 3;
num_lfe = 1;
break;
case 11:
num_sce = 2;
num_cpe = 2;
num_lfe = 1;
break;
default:
GST_WARNING ("Unknown channel config in header: %d", channel_config);
return NULL;
}
switch (audio_object_type) {
case 0: /* NULL */
GST_WARNING ("profile 0 is not a valid profile");
return NULL;
case 2: /* LC */
pcu_ref = 3;
rcu_ref = 3;
break;
case 3: /* SSR */
pcu_ref = 4;
rcu_ref = 3;
break;
case 4: /* LTP */
pcu_ref = 4;
rcu_ref = 4;
break;
case 1: /* Main */
default:
/* Other than a couple of ER profiles, Main is the worst-case */
pcu_ref = 5;
rcu_ref = 5;
break;
}
/* "fs_ref" is 48000 Hz for AAC Main/LC/SSR/LTP. SBR's fs_ref is defined as
* 24000/48000 (in/out), for SBR streams. Actual support is a FIXME */
pcu = ((float) rate / 48000) * pcu_ref *
((2 * num_cpe) + num_sce + num_lfe + num_cce_indep + (0.3 * num_cce_dep));
rcu = ((float) rcu_ref) * (num_sce + (0.5 * num_lfe) + (0.5 * num_cce_indep) +
(0.4 * num_cce_dep));
if (num_cpe < 2)
rcu += (rcu_ref + (rcu_ref - 1)) * num_cpe;
else
rcu += (rcu_ref + (rcu_ref - 1) * ((2 * num_cpe) - 1));
num_channels = num_sce + (2 * num_cpe);
if (audio_object_type == 2) {
/* AAC LC => return the level as per the 'AAC Profile' */
if (num_channels <= 2 && rate <= 24000 && pcu <= 3 && rcu <= 5)
ret = 1;
else if (num_channels <= 2 && rate <= 48000 && pcu <= 6 && rcu <= 5)
ret = 2;
/* There is no level 3 for the AAC Profile */
else if (num_channels <= 5 && rate <= 48000 && pcu <= 19 && rcu <= 15)
ret = 4;
else if (num_channels <= 5 && rate <= 96000 && pcu <= 38 && rcu <= 15)
ret = 5;
else if (num_channels <= 7 && rate <= 48000 && pcu <= 25 && rcu <= 19)
ret = 6;
else if (num_channels <= 7 && rate <= 96000 && pcu <= 50 && rcu <= 19)
ret = 7;
} else {
/* Return the level as per the 'Main Profile' */
if (pcu < 40 && rcu < 20)
ret = 1;
else if (pcu < 80 && rcu < 64)
ret = 2;
else if (pcu < 160 && rcu < 128)
ret = 3;
else if (pcu < 320 && rcu < 256)
ret = 4;
}
if (ret == -1) {
GST_WARNING ("couldn't determine level: profile=%u, rate=%u, "
"channel_config=%u, pcu=%d,rcu=%d", audio_object_type, rate,
channel_config, pcu, rcu);
return NULL;
} else {
return digit_to_string (ret);
}
}
/**
* gst_codec_utils_aac_caps_set_level_and_profile:
* @caps: the #GstCaps to which level and profile fields are to be added
* @audio_config: (array length=len): a pointer to the AudioSpecificConfig
* as specified in the Elementary Stream Descriptor (esds)
* in ISO/IEC 14496-1. (See below for more details)
* @len: Length of @audio_config in bytes
*
* Sets the level and profile on @caps if it can be determined from
* @audio_config. See gst_codec_utils_aac_get_level() and
* gst_codec_utils_aac_get_profile() for more details on the parameters.
* @caps must be audio/mpeg caps with an "mpegversion" field of either 2 or 4.
* If mpegversion is 4, the "base-profile" field is also set in @caps.
*
* Returns: %TRUE if the level and profile could be set, %FALSE otherwise.
*/
gboolean
gst_codec_utils_aac_caps_set_level_and_profile (GstCaps * caps,
const guint8 * audio_config, guint len)
{
GstStructure *s;
const gchar *level, *profile;
int mpegversion = 0;
g_return_val_if_fail (GST_IS_CAPS (caps), FALSE);
g_return_val_if_fail (GST_CAPS_IS_SIMPLE (caps), FALSE);
g_return_val_if_fail (GST_SIMPLE_CAPS_HAS_NAME (caps, "audio/mpeg"), FALSE);
g_return_val_if_fail (GST_SIMPLE_CAPS_HAS_FIELD (caps, "mpegversion"), FALSE);
g_return_val_if_fail (audio_config != NULL, FALSE);
s = gst_caps_get_structure (caps, 0);
gst_structure_get_int (s, "mpegversion", &mpegversion);
g_return_val_if_fail (mpegversion == 2 || mpegversion == 4, FALSE);
level = gst_codec_utils_aac_get_level (audio_config, len);
if (level != NULL)
gst_structure_set (s, "level", G_TYPE_STRING, level, NULL);
profile = gst_codec_utils_aac_get_profile (audio_config, len);
if (profile != NULL) {
if (mpegversion == 4) {
gst_structure_set (s, "base-profile", G_TYPE_STRING, profile,
"profile", G_TYPE_STRING, profile, NULL);
} else {
gst_structure_set (s, "profile", G_TYPE_STRING, profile, NULL);
}
}
GST_LOG ("profile : %s", (profile) ? profile : "---");
GST_LOG ("level : %s", (level) ? level : "---");
return (level != NULL && profile != NULL);
}
/**
* gst_codec_utils_h264_get_profile:
* @sps: (array length=len): Pointer to the sequence parameter set for the stream.
* @len: Length of the data available in @sps.
*
* Converts the profile indication (profile_idc) in the stream's
* sequence parameter set into a string. The SPS is expected to have the
* following format, as defined in the H.264 specification. The SPS is viewed
* as a bitstream here, with bit 0 being the most significant bit of the first
* byte.
*
* * Bit 0:7 - Profile indication
* * Bit 8 - constraint_set0_flag
* * Bit 9 - constraint_set1_flag
* * Bit 10 - constraint_set2_flag
* * Bit 11 - constraint_set3_flag
* * Bit 12 - constraint_set3_flag
* * Bit 13:15 - Reserved
* * Bit 16:24 - Level indication
*
* Returns: (nullable): The profile as a const string, or %NULL if there is an error.
*/
const gchar *
gst_codec_utils_h264_get_profile (const guint8 * sps, guint len)
{
const gchar *profile = NULL;
gint csf1, csf3, csf4, csf5;
g_return_val_if_fail (sps != NULL, NULL);
if (len < 2)
return NULL;
GST_MEMDUMP ("SPS", sps, len);
csf1 = (sps[1] & 0x40) >> 6;
csf3 = (sps[1] & 0x10) >> 4;
csf4 = (sps[1] & 0x08) >> 3;
csf5 = (sps[1] & 0x04) >> 2;
switch (sps[0]) {
case 66:
if (csf1)
profile = "constrained-baseline";
else
profile = "baseline";
break;
case 77:
profile = "main";
break;
case 88:
profile = "extended";
break;
case 100:
if (csf4) {
if (csf5)
profile = "constrained-high";
else
profile = "progressive-high";
} else
profile = "high";
break;
case 110:
if (csf3)
profile = "high-10-intra";
else if (csf4)
profile = "progressive-high-10";
else
profile = "high-10";
break;
case 122:
if (csf3)
profile = "high-4:2:2-intra";
else
profile = "high-4:2:2";
break;
case 244:
if (csf3)
profile = "high-4:4:4-intra";
else
profile = "high-4:4:4";
break;
case 44:
profile = "cavlc-4:4:4-intra";
break;
case 118:
profile = "multiview-high";
break;
case 128:
profile = "stereo-high";
break;
case 83:
if (csf5)
profile = "scalable-constrained-baseline";
else
profile = "scalable-baseline";
break;
case 86:
if (csf3)
profile = "scalable-high-intra";
else if (csf5)
profile = "scalable-constrained-high";
else
profile = "scalable-high";
break;
default:
return NULL;
}
return profile;
}
/**
* gst_codec_utils_h264_get_level:
* @sps: (array length=len): Pointer to the sequence parameter set for the stream.
* @len: Length of the data available in @sps.
*
* Converts the level indication (level_idc) in the stream's
* sequence parameter set into a string. The SPS is expected to have the
* same format as for gst_codec_utils_h264_get_profile().
*
* Returns: (nullable): The level as a const string, or %NULL if there is an error.
*/
const gchar *
gst_codec_utils_h264_get_level (const guint8 * sps, guint len)
{
gint csf3;
g_return_val_if_fail (sps != NULL, NULL);
if (len < 3)
return NULL;
GST_MEMDUMP ("SPS", sps, len);
csf3 = (sps[1] & 0x10) >> 4;
if (sps[2] == 0)
return NULL;
else if ((sps[2] == 11 && csf3) || sps[2] == 9)
return "1b";
else if (sps[2] % 10 == 0)
return digit_to_string (sps[2] / 10);
else {
switch (sps[2]) {
case 11:
return "1.1";
case 12:
return "1.2";
case 13:
return "1.3";
case 21:
return "2.1";
case 22:
return "2.2";
case 31:
return "3.1";
case 32:
return "3.2";
case 41:
return "4.1";
case 42:
return "4.2";
case 51:
return "5.1";
case 52:
return "5.2";
case 61:
return "6.1";
case 62:
return "6.2";
default:
return NULL;
}
}
}
/**
* gst_codec_utils_h264_get_level_idc:
* @level: A level string from caps
*
* Transform a level string from the caps into the level_idc
*
* Returns: the level_idc or 0 if the level is unknown
*/
guint8
gst_codec_utils_h264_get_level_idc (const gchar * level)
{
g_return_val_if_fail (level != NULL, 0);
if (!strcmp (level, "1"))
return 10;
else if (!strcmp (level, "1b"))
return 9;
else if (!strcmp (level, "1.1"))
return 11;
else if (!strcmp (level, "1.2"))
return 12;
else if (!strcmp (level, "1.3"))
return 13;
else if (!strcmp (level, "2"))
return 20;
else if (!strcmp (level, "2.1"))
return 21;
else if (!strcmp (level, "2.2"))
return 22;
else if (!strcmp (level, "3"))
return 30;
else if (!strcmp (level, "3.1"))
return 31;
else if (!strcmp (level, "3.2"))
return 32;
else if (!strcmp (level, "4"))
return 40;
else if (!strcmp (level, "4.1"))
return 41;
else if (!strcmp (level, "4.2"))
return 42;
else if (!strcmp (level, "5"))
return 50;
else if (!strcmp (level, "5.1"))
return 51;
else if (!strcmp (level, "5.2"))
return 52;
else if (!strcmp (level, "6"))
return 60;
else if (!strcmp (level, "6.1"))
return 61;
else if (!strcmp (level, "6.2"))
return 62;
GST_WARNING ("Invalid level %s", level);
return 0;
}
/**
* gst_codec_utils_h264_caps_set_level_and_profile:
* @caps: the #GstCaps to which the level and profile are to be added
* @sps: (array length=len): Pointer to the sequence parameter set for the stream.
* @len: Length of the data available in @sps.
*
* Sets the level and profile in @caps if it can be determined from @sps. See
* gst_codec_utils_h264_get_level() and gst_codec_utils_h264_get_profile()
* for more details on the parameters.
*
* Returns: %TRUE if the level and profile could be set, %FALSE otherwise.
*/
gboolean
gst_codec_utils_h264_caps_set_level_and_profile (GstCaps * caps,
const guint8 * sps, guint len)
{
const gchar *level, *profile;
g_return_val_if_fail (GST_IS_CAPS (caps), FALSE);
g_return_val_if_fail (GST_CAPS_IS_SIMPLE (caps), FALSE);
g_return_val_if_fail (GST_SIMPLE_CAPS_HAS_NAME (caps, "video/x-h264"), FALSE);
g_return_val_if_fail (sps != NULL, FALSE);
level = gst_codec_utils_h264_get_level (sps, len);
if (level != NULL)
gst_caps_set_simple (caps, "level", G_TYPE_STRING, level, NULL);
profile = gst_codec_utils_h264_get_profile (sps, len);
if (profile != NULL)
gst_caps_set_simple (caps, "profile", G_TYPE_STRING, profile, NULL);
GST_LOG ("profile : %s", (profile) ? profile : "---");
GST_LOG ("level : %s", (level) ? level : "---");
return (level != NULL && profile != NULL);
}
/**
* gst_codec_utils_h264_get_profile_flags_level:
* @codec_data: (array length=len): H264 AVCC extradata
* @len: length of @codec_data
* @profile: (optional) (out): return location for h264 profile_idc or %NULL
* @flags: (optional) (out): return location for h264 constraint set flags or %NULL
* @level: (optional) (out): return location h264 level_idc or %NULL
*
* Parses profile, flags, and level from a H264 AVCC extradata/sequence_header.
* These are most commonly retrieved from a video/x-h264 caps with a codec_data
* buffer.
*
* The format of H264 AVCC extradata/sequence_header is documented in the
* ITU-T H.264 specification section 7.3.2.1.1 as well as in ISO/IEC 14496-15
* section 5.3.3.1.2.
*
* Returns: %TRUE on success, %FALSE on failure
*
* Since: 1.20
*/
gboolean
gst_codec_utils_h264_get_profile_flags_level (const guint8 * codec_data,
guint len, guint8 * profile, guint8 * flags, guint8 * level)
{
gboolean ret = FALSE;
g_return_val_if_fail (codec_data != NULL, FALSE);
if (len < 7) {
GST_WARNING ("avc codec data is too small");
goto done;
}
if (codec_data[0] != 1) {
GST_WARNING ("failed to parse avc codec version, must be 1");
goto done;
}
if (profile) {
*profile = codec_data[1];
}
if (flags) {
*flags = codec_data[2];
}
if (level) {
*level = codec_data[3];
}
ret = TRUE;
done:
return ret;
}
/* forked from gsth265parse.c */
typedef struct
{
const gchar *profile;
guint8 max_14bit_constraint_flag;
guint8 max_12bit_constraint_flag;
guint8 max_10bit_constraint_flag;
guint8 max_8bit_constraint_flag;
guint8 max_422chroma_constraint_flag;
guint8 max_420chroma_constraint_flag;
guint8 max_monochrome_constraint_flag;
guint8 intra_constraint_flag;
guint8 one_picture_only_constraint_flag;
guint8 lower_bit_rate_constraint_flag;
/* Tie breaker if more than one profiles are matching */
guint priority;
} GstH265ExtensionProfile;
typedef struct
{
const GstH265ExtensionProfile *profile;
guint extra_constraints;
} H265ExtensionProfileMatch;
static gint
sort_fre_profile_matches (H265ExtensionProfileMatch * a,
H265ExtensionProfileMatch * b)
{
gint d;
d = a->extra_constraints - b->extra_constraints;
if (d)
return d;
return b->profile->priority - a->profile->priority;
}
static const gchar *
utils_get_extension_profile (const GstH265ExtensionProfile * profiles,
guint num, GstH265ExtensionProfile * ext_profile)
{
guint i;
const gchar *profile = NULL;
GList *cand = NULL;
for (i = 0; i < num; i++) {
GstH265ExtensionProfile p = profiles[i];
guint extra_constraints = 0;
H265ExtensionProfileMatch *m;
/* Filter out all the profiles having constraints not satisfied by
* @ext_profile.
* Then pick the one having the least extra constraints. This allow us
* to match the closet profile if bitstream contains not standard
* constraints. */
if (p.max_14bit_constraint_flag != ext_profile->max_14bit_constraint_flag) {
if (p.max_14bit_constraint_flag)
continue;
extra_constraints++;
}
if (p.max_12bit_constraint_flag != ext_profile->max_12bit_constraint_flag) {
if (p.max_12bit_constraint_flag)
continue;
extra_constraints++;
}
if (p.max_10bit_constraint_flag != ext_profile->max_10bit_constraint_flag) {
if (p.max_10bit_constraint_flag)
continue;
extra_constraints++;
}
if (p.max_8bit_constraint_flag != ext_profile->max_8bit_constraint_flag) {
if (p.max_8bit_constraint_flag)
continue;
extra_constraints++;
}
if (p.max_422chroma_constraint_flag !=
ext_profile->max_422chroma_constraint_flag) {
if (p.max_422chroma_constraint_flag)
continue;
extra_constraints++;
}
if (p.max_420chroma_constraint_flag !=
ext_profile->max_420chroma_constraint_flag) {
if (p.max_420chroma_constraint_flag)
continue;
extra_constraints++;
}
if (p.max_monochrome_constraint_flag !=
ext_profile->max_monochrome_constraint_flag) {
if (p.max_monochrome_constraint_flag)
continue;
extra_constraints++;
}
if (p.intra_constraint_flag != ext_profile->intra_constraint_flag) {
if (p.intra_constraint_flag)
continue;
extra_constraints++;
}
if (p.one_picture_only_constraint_flag !=
ext_profile->one_picture_only_constraint_flag) {
if (p.one_picture_only_constraint_flag)
continue;
extra_constraints++;
}
if (p.lower_bit_rate_constraint_flag
&& !ext_profile->lower_bit_rate_constraint_flag)
continue;
/* choose this one if all flags are matched */
if (extra_constraints == 0) {
profile = p.profile;
break;
}
m = g_new0 (H265ExtensionProfileMatch, 1);
m->profile = &profiles[i];
m->extra_constraints = extra_constraints;
cand = g_list_prepend (cand, m);
}
if (!profile && cand) {
H265ExtensionProfileMatch *m;
cand = g_list_sort (cand, (GCompareFunc) sort_fre_profile_matches);
m = cand->data;
profile = m->profile->profile;
}
if (cand)
g_list_free_full (cand, g_free);
return profile;
}
static const gchar *
utils_get_format_range_extension_profile (GstH265ExtensionProfile * ext_profile)
{
static const GstH265ExtensionProfile profiles[] = {
/* FIXME 2.0: Consider ':' separated subsampling notation for consistency
* https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/merge_requests/23
*/
/* Rec. ITU-T H.265 Table A.2 format range extensions profiles */
/* *INDENT-OFF* */
{"monochrome", 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0},
{"monochrome-10", 0, 1, 1, 0, 1, 1, 1, 0, 0, 1, 1},
{"monochrome-12", 0, 1, 0, 0, 1, 1, 1, 0, 0, 1, 2},
{"monochrome-16", 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 3},
{"main-12", 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 4},
{"main-422-10", 0, 1, 1, 0, 1, 0, 0, 0, 0, 1, 5},
{"main-422-12", 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 6},
{"main-444", 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 7},
{"main-444-10", 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 8},
{"main-444-12", 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 9},
{"main-intra", 0, 1, 1, 1, 1, 1, 0, 1, 0, 0, 10},
{"main-10-intra", 0, 1, 1, 0, 1, 1, 0, 1, 0, 0, 11},
{"main-12-intra", 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 12},
{"main-422-10-intra", 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 13},
{"main-422-12-intra", 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 14},
{"main-444-intra", 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 15},
{"main-444-10-intra", 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 16},
{"main-444-12-intra", 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 17},
{"main-444-16-intra", 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 18},
{"main-444-still-picture", 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 19},
{"main-444-16-still-picture", 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 20},
/* *INDENT-ON* */
};
return utils_get_extension_profile (profiles, G_N_ELEMENTS (profiles),
ext_profile);
}
static const gchar *
utils_get_3d_profile (GstH265ExtensionProfile * ext_profile)
{
static const GstH265ExtensionProfile profiles[] = {
/* Rec. ITU-T H.265 I.11.1 3D Main profile */
/* *INDENT-OFF* */
{"3d-main", 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0},
/* *INDENT-ON* */
};
return utils_get_extension_profile (profiles, G_N_ELEMENTS (profiles),
ext_profile);
}
static const gchar *
utils_get_multiview_profile (GstH265ExtensionProfile * ext_profile)
{
static const GstH265ExtensionProfile profiles[] = {
/* Rec. ITU-T H.265 G.11.1 Multiview Main profile */
/* *INDENT-OFF* */
{"multiview-main", 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0},
/* *INDENT-ON* */
};
return utils_get_extension_profile (profiles, G_N_ELEMENTS (profiles),
ext_profile);
}
static const gchar *
utils_get_scalable_profile (GstH265ExtensionProfile * ext_profile)
{
static const GstH265ExtensionProfile profiles[] = {
/* Rec. ITU-T H.265 H.11.1 */
/* *INDENT-OFF* */
{"scalable-main", 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0},
{"scalable-main-10", 0, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1},
/* *INDENT-ON* */
};
return utils_get_extension_profile (profiles, G_N_ELEMENTS (profiles),
ext_profile);
}
static const gchar *
utils_get_high_throughput_profile (GstH265ExtensionProfile * ext_profile)
{
static const GstH265ExtensionProfile profiles[] = {
/* Rec. ITU-T H.265 Table A.3 high throughput profiles */
/* *INDENT-OFF* */
{"high-throughput-444", 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0},
{"high-throughput-444-10", 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1},
{"high-throughput-444-14", 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2},
{"high-throughput-444-16-intra", 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 3},
/* *INDENT-ON* */
};
return utils_get_extension_profile (profiles, G_N_ELEMENTS (profiles),
ext_profile);
}
static const gchar *
utils_get_screen_content_coding_extensions_profile (GstH265ExtensionProfile *
ext_profile)
{
static const GstH265ExtensionProfile profiles[] = {
/* Rec. ITU-T H.265 Table A.5 screen content coding extensions profiles */
/* *INDENT-OFF* */
{"screen-extended-main", 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0},
{"screen-extended-main-10", 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1},
{"screen-extended-main-444", 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 2},
{"screen-extended-main-444-10", 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 3},
/* identical to screen-extended-main-444 */
{"screen-extended-high-throughput-444",
1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 4},
/* identical to screen-extended-main-444-10 */
{"screen-extended-high-throughput-444-10",
1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 5},
{"screen-extended-high-throughput-444-14",
1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 6},
/* *INDENT-ON* */
};
return utils_get_extension_profile (profiles, G_N_ELEMENTS (profiles),
ext_profile);
}
static const gchar *
utils_get_scalable_format_range_extensions_profile (GstH265ExtensionProfile *
ext_profile)
{
static const GstH265ExtensionProfile profiles[] = {
/* Rec. ITU-T H.265 Table H.4 scalable range extensions profiles */
/* *INDENT-OFF* */
{"scalable-monochrome", 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0},
{"scalable-monochrome-12", 1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 1},
{"scalable-monochrome-16", 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 2},
{"scalable-main-444", 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 3},
/* *INDENT-ON* */
};
return utils_get_extension_profile (profiles, G_N_ELEMENTS (profiles),
ext_profile);
}
/**
* gst_codec_utils_h265_get_profile:
* @profile_tier_level: (array length=len): Pointer to the profile_tier_level
* structure for the stream.
* @len: Length of the data available in @profile_tier_level
*
* Converts the profile indication (general_profile_idc) in the stream's
* profile_level_tier structure into a string. The profile_tier_level is
* expected to have the following format, as defined in the H.265
* specification. The profile_tier_level is viewed as a bitstream here,
* with bit 0 being the most significant bit of the first byte.
*
* * Bit 0:1 - general_profile_space
* * Bit 2 - general_tier_flag
* * Bit 3:7 - general_profile_idc
* * Bit 8:39 - gernal_profile_compatibility_flags
* * Bit 40 - general_progressive_source_flag
* * Bit 41 - general_interlaced_source_flag
* * Bit 42 - general_non_packed_constraint_flag
* * Bit 43 - general_frame_only_constraint_flag
* * Bit 44:87 - See below
* * Bit 88:95 - general_level_idc
*
* Returns: (nullable): The profile as a const string, or %NULL if there is an error.
*
* Since: 1.4
*/
const gchar *
gst_codec_utils_h265_get_profile (const guint8 * profile_tier_level, guint len)
{
const gchar *profile = NULL;
gint profile_idc;
guint i;
guint8 profile_compatibility_flags[32] = { 0, };
GstBitReader br = GST_BIT_READER_INIT (profile_tier_level, len);
g_return_val_if_fail (profile_tier_level != NULL, NULL);
if (len < 2)
return NULL;
GST_MEMDUMP ("ProfileTierLevel", profile_tier_level, len);
profile_idc = (profile_tier_level[0] & 0x1f);
if (profile_idc == 1)
profile = "main";
else if (profile_idc == 2)
profile = "main-10";
else if (profile_idc == 3)
profile = "main-still-picture";
if (len > 4) {
if (!gst_bit_reader_skip (&br, 8))
return NULL;
for (i = 0; i < 32; i++) {
if (!gst_bit_reader_get_bits_uint8 (&br, &profile_compatibility_flags[i],
1))
return NULL;
}
}
if (!profile) {
if (profile_compatibility_flags[1])
profile = "main";
else if (profile_compatibility_flags[2])
profile = "main-10";
else if (profile_compatibility_flags[3])
profile = "main-still-picture";
}
if (profile)
return profile;
if (profile_idc >= 4 && profile_idc <= 11 && len >= 11) {
GstH265ExtensionProfile ext_profile = { 0, };
/*
* Bit 40 - general_progressive_source_flag
* Bit 41 - general_interlaced_source_flag
* Bit 42 - general_non_packed_constraint_flag
* Bit 43 - general_frame_only_constraint_flag
*/
if (!gst_bit_reader_skip (&br, 4))
return NULL;
/* Range extensions
* profile_idc
* 4 : Format range extensions profiles
* 5 : High throughput profiles
* 6 : Multiview main profile
* 7 : Scalable main profiles
* 8 : 3D Main profile
* 9 : Screen content coding extensions profiles
* 10 : Scalable format range extensions profiles
*
* Bit 44 - general_max_12bit_constraint_flag
* Bit 45 - general_max_10bit_constraint_flag
* Bit 46 - general_max_8bit_constraint_flag
* Bit 47 - general_max_422chroma_constraint_flag
* Bit 48 - general_max_420chroma_constraint_flag
* Bit 49 - general_max_monochrome_constraint_flag
* Bit 50 - general_intra_constraint_flag
* Bit 51 - general_one_picture_only_constraint_flag
* Bit 52 - general_lower_bit_rate_constraint_flag
*/
if (!gst_bit_reader_get_bits_uint8 (&br,
&ext_profile.max_12bit_constraint_flag, 1))
return NULL;
if (!gst_bit_reader_get_bits_uint8 (&br,
&ext_profile.max_10bit_constraint_flag, 1))
return NULL;
if (!gst_bit_reader_get_bits_uint8 (&br,
&ext_profile.max_8bit_constraint_flag, 1))
return NULL;
if (!gst_bit_reader_get_bits_uint8 (&br,
&ext_profile.max_422chroma_constraint_flag, 1))
return NULL;
if (!gst_bit_reader_get_bits_uint8 (&br,
&ext_profile.max_420chroma_constraint_flag, 1))
return NULL;
if (!gst_bit_reader_get_bits_uint8 (&br,
&ext_profile.max_monochrome_constraint_flag, 1))
return NULL;
if (!gst_bit_reader_get_bits_uint8 (&br,
&ext_profile.intra_constraint_flag, 1))
return NULL;
if (!gst_bit_reader_get_bits_uint8 (&br,
&ext_profile.one_picture_only_constraint_flag, 1))
return NULL;
if (!gst_bit_reader_get_bits_uint8 (&br,
&ext_profile.lower_bit_rate_constraint_flag, 1))
return NULL;
if (profile_idc == 5 || profile_idc == 9 ||
profile_idc == 10 || profile_idc == 11 ||
profile_compatibility_flags[5] || profile_compatibility_flags[9] ||
profile_compatibility_flags[10] || profile_compatibility_flags[11]) {
/* Bit 53 - general_max_14bit_constraint_flag */
if (!gst_bit_reader_get_bits_uint8 (&br,
&ext_profile.max_14bit_constraint_flag, 1))
return NULL;
}
if (profile_idc == 4 || profile_compatibility_flags[4])
return utils_get_format_range_extension_profile (&ext_profile);
if (profile_idc == 5 || profile_compatibility_flags[5])
return utils_get_high_throughput_profile (&ext_profile);
if (profile_idc == 6 || profile_compatibility_flags[6])
return utils_get_multiview_profile (&ext_profile);
if (profile_idc == 7 || profile_compatibility_flags[7])
return utils_get_scalable_profile (&ext_profile);
if (profile_idc == 8 || profile_compatibility_flags[8])
return utils_get_3d_profile (&ext_profile);
if (profile_idc == 9 || profile_compatibility_flags[9] ||
profile_idc == 11 || profile_compatibility_flags[11])
return utils_get_screen_content_coding_extensions_profile (&ext_profile);
if (profile_idc == 10 || profile_compatibility_flags[10])
return utils_get_scalable_format_range_extensions_profile (&ext_profile);
}
return profile;
}
/**
* gst_codec_utils_h265_get_tier:
* @profile_tier_level: (array length=len): Pointer to the profile_tier_level
* for the stream.
* @len: Length of the data available in @profile_tier_level.
*
* Converts the tier indication (general_tier_flag) in the stream's
* profile_tier_level structure into a string. The profile_tier_level
* is expected to have the same format as for gst_codec_utils_h264_get_profile().
*
* Returns: (nullable): The tier as a const string, or %NULL if there is an error.
*
* Since: 1.4
*/
const gchar *
gst_codec_utils_h265_get_tier (const guint8 * profile_tier_level, guint len)
{
const gchar *tier = NULL;
gint tier_flag = 0;
g_return_val_if_fail (profile_tier_level != NULL, NULL);
if (len < 1)
return NULL;
GST_MEMDUMP ("ProfileTierLevel", profile_tier_level, len);
tier_flag = (profile_tier_level[0] & 0x20) >> 5;
if (tier_flag)
tier = "high";
else
tier = "main";
return tier;
}
/**
* gst_codec_utils_h265_get_level:
* @profile_tier_level: (array length=len): Pointer to the profile_tier_level
* for the stream
* @len: Length of the data available in @profile_tier_level.
*
* Converts the level indication (general_level_idc) in the stream's
* profile_tier_level structure into a string. The profiel_tier_level is
* expected to have the same format as for gst_codec_utils_h264_get_profile().
*
* Returns: (nullable): The level as a const string, or %NULL if there is an error.
*
* Since: 1.4
*/
const gchar *
gst_codec_utils_h265_get_level (const guint8 * profile_tier_level, guint len)
{
g_return_val_if_fail (profile_tier_level != NULL, NULL);
if (len < 12)
return NULL;
GST_MEMDUMP ("ProfileTierLevel", profile_tier_level, len);
if (profile_tier_level[11] == 0)
return NULL;
else if (profile_tier_level[11] % 30 == 0)
return digit_to_string (profile_tier_level[11] / 30);
else {
switch (profile_tier_level[11]) {
case 63:
return "2.1";
break;
case 93:
return "3.1";
break;
case 123:
return "4.1";
break;
case 153:
return "5.1";
break;
case 156:
return "5.2";
break;
case 183:
return "6.1";
break;
case 186:
return "6.2";
break;
default:
return NULL;
}
}
}
/**
* gst_codec_utils_h265_get_level_idc:
* @level: A level string from caps
*
* Transform a level string from the caps into the level_idc
*
* Returns: the level_idc or 0 if the level is unknown
*
* Since: 1.4
*/
guint8
gst_codec_utils_h265_get_level_idc (const gchar * level)
{
g_return_val_if_fail (level != NULL, 0);
if (!strcmp (level, "1"))
return 30;
else if (!strcmp (level, "2"))
return 60;
else if (!strcmp (level, "2.1"))
return 63;
else if (!strcmp (level, "3"))
return 90;
else if (!strcmp (level, "3.1"))
return 93;
else if (!strcmp (level, "4"))
return 120;
else if (!strcmp (level, "4.1"))
return 123;
else if (!strcmp (level, "5"))
return 150;
else if (!strcmp (level, "5.1"))
return 153;
else if (!strcmp (level, "5.2"))
return 156;
else if (!strcmp (level, "6"))
return 180;
else if (!strcmp (level, "6.1"))
return 183;
else if (!strcmp (level, "6.2"))
return 186;
GST_WARNING ("Invalid level %s", level);
return 0;
}
/**
* gst_codec_utils_h265_caps_set_level_tier_and_profile:
* @caps: the #GstCaps to which the level, tier and profile are to be added
* @profile_tier_level: (array length=len): Pointer to the profile_tier_level
* struct
* @len: Length of the data available in @profile_tier_level.
*
* Sets the level, tier and profile in @caps if it can be determined from
* @profile_tier_level. See gst_codec_utils_h265_get_level(),
* gst_codec_utils_h265_get_tier() and gst_codec_utils_h265_get_profile()
* for more details on the parameters.
*
* Returns: %TRUE if the level, tier, profile could be set, %FALSE otherwise.
*
* Since: 1.4
*/
gboolean
gst_codec_utils_h265_caps_set_level_tier_and_profile (GstCaps * caps,
const guint8 * profile_tier_level, guint len)
{
const gchar *level, *tier, *profile;
g_return_val_if_fail (GST_IS_CAPS (caps), FALSE);
g_return_val_if_fail (GST_CAPS_IS_SIMPLE (caps), FALSE);
g_return_val_if_fail (GST_SIMPLE_CAPS_HAS_NAME (caps, "video/x-h265"), FALSE);
g_return_val_if_fail (profile_tier_level != NULL, FALSE);
level = gst_codec_utils_h265_get_level (profile_tier_level, len);
if (level != NULL)
gst_caps_set_simple (caps, "level", G_TYPE_STRING, level, NULL);
tier = gst_codec_utils_h265_get_tier (profile_tier_level, len);
if (tier != NULL)
gst_caps_set_simple (caps, "tier", G_TYPE_STRING, tier, NULL);
profile = gst_codec_utils_h265_get_profile (profile_tier_level, len);
if (profile != NULL)
gst_caps_set_simple (caps, "profile", G_TYPE_STRING, profile, NULL);
GST_LOG ("profile : %s", (profile) ? profile : "---");
GST_LOG ("tier : %s", (tier) ? tier : "---");
GST_LOG ("level : %s", (level) ? level : "---");
return (level != NULL && tier != NULL && profile != NULL);
}
/**
* gst_codec_utils_mpeg4video_get_profile:
* @vis_obj_seq: (array length=len): Pointer to the visual object
* sequence for the stream.
* @len: Length of the data available in @sps.
*
* Converts the profile indication in the stream's visual object sequence into
* a string. @vis_obj_seq is expected to be the data following the visual
* object sequence start code. Only the first byte
* (profile_and_level_indication) is used.
*
* Returns: (nullable): The profile as a const string, or NULL if there is an error.
*/
const gchar *
gst_codec_utils_mpeg4video_get_profile (const guint8 * vis_obj_seq, guint len)
{
/* The profile/level codes are from 14496-2, table G-1, and the Wireshark
* sources: epan/dissectors/packet-mp4ves.c */
/* These are a direct mapping from the integer profile id -> string. Profiles
* 0x6, 0xe and 0xf can correspond to more than one profile depending on the
* second 4 bits of vis_obj_seq[0], so they are handled separately. */
static const char *profiles[] = { "simple", "simple-scalable", "core",
"main", "n-bit", "scalable", NULL, "basic-animated-texture", "hybrid",
"advanced-real-time-simple", "core-scalable", "advanced-coding-efficiency",
"advanced-core", "advanced-scalable-texture",
};
int profile_id, level_id;
g_return_val_if_fail (vis_obj_seq != NULL, NULL);
if (len < 1)
return NULL;
GST_MEMDUMP ("VOS", vis_obj_seq, len);
profile_id = vis_obj_seq[0] >> 4;
level_id = vis_obj_seq[0] & 0xf;
GST_LOG ("profile_id = %d, level_id = %d", profile_id, level_id);
if (profile_id != 6 && profile_id < 0xe)
return profiles[profile_id];
if (profile_id != 0xf && level_id == 0)
return NULL;
switch (profile_id) {
case 0x6:
if (level_id < 3)
return "simple-face";
else if (level_id < 5)
return "simple-fba";
break;
case 0xe:
if (level_id < 5)
return "simple-studio";
else if (level_id < 9)
return "core-studio";
break;
case 0xf:
if (level_id < 6)
return "advanced-simple";
else if (level_id > 7 && level_id < 0xe)
return "fine-granularity-scalable";
break;
}
return NULL;
}
/**
* gst_codec_utils_mpeg4video_get_level:
* @vis_obj_seq: (array length=len): Pointer to the visual object
* sequence for the stream.
* @len: Length of the data available in @sps.
*
* Converts the level indication in the stream's visual object sequence into
* a string. @vis_obj_seq is expected to be the data following the visual
* object sequence start code. Only the first byte
* (profile_and_level_indication) is used.
*
* Returns: (nullable): The level as a const string, or NULL if there is an error.
*/
const gchar *
gst_codec_utils_mpeg4video_get_level (const guint8 * vis_obj_seq, guint len)
{
/* The profile/level codes are from 14496-2, table G-1, the Wireshark
* sources: epan/dissectors/packet-mp4ves.c and the Xvid Sources:
* src/xvid.h.
* Levels 4a and 5 for SP were added in Amendment 2, level 6 in Amendment 4
* (see Xvid sources vfw/config.c)
*
* Each profile has a different maximum level it defines. Some of them still
* need special case handling, because not all levels start from 1, and the
* Simple profile defines an intermediate level as well. */
static const int level_max[] = { 6, 2, 2, 4, 2, 1, 2, 2, 2, 4, 3, 4, 2, 3, 4,
5
};
int profile_id, level_id;
g_return_val_if_fail (vis_obj_seq != NULL, NULL);
if (len < 1)
return NULL;
GST_MEMDUMP ("VOS", vis_obj_seq, len);
profile_id = vis_obj_seq[0] >> 4;
level_id = vis_obj_seq[0] & 0xf;
GST_LOG ("profile_id = %d, level_id = %d", profile_id, level_id);
if (profile_id != 0xf && level_id == 0)
return NULL;
/* Let's do some validation of the level */
switch (profile_id) {
case 0x3:
if (level_id == 1)
return NULL;
break;
case 0x4:
if (level_id != 2)
return NULL;
break;
case 0x6:
if (level_id > 5)
return NULL;
break;
case 0xe:
if (level_id > 9)
return NULL;
break;
case 0xf:
if (level_id == 6 || level_id == 7 || level_id > 0xd)
return NULL;
break;
}
if (profile_id == 0 && level_id == 8)
/* Simple Profile / Level 0 */
return "0";
else if (profile_id == 0 && level_id == 9)
/* Simple Profile / Level 0b */
return "0b";
else if (profile_id == 0 && level_id == 4)
/* Simple Profile / Level 4a */
return "4a";
else if (profile_id == 0xf && level_id > 7)
/* Fine Granularity Scalable Profile */
return digit_to_string (level_id - 8);
else if (level_id <= level_max[profile_id])
/* Levels for all other cases */
return digit_to_string (level_id);
return NULL;
}
/**
* gst_codec_utils_mpeg4video_caps_set_level_and_profile:
* @caps: the #GstCaps to which the level and profile are to be added
* @vis_obj_seq: (array length=len): Pointer to the visual object
* sequence for the stream.
* @len: Length of the data available in @sps.
*
* Sets the level and profile in @caps if it can be determined from
* @vis_obj_seq. See gst_codec_utils_mpeg4video_get_level() and
* gst_codec_utils_mpeg4video_get_profile() for more details on the
* parameters.
*
* Returns: %TRUE if the level and profile could be set, %FALSE otherwise.
*/
gboolean
gst_codec_utils_mpeg4video_caps_set_level_and_profile (GstCaps * caps,
const guint8 * vis_obj_seq, guint len)
{
const gchar *profile, *level;
g_return_val_if_fail (GST_IS_CAPS (caps), FALSE);
g_return_val_if_fail (GST_CAPS_IS_SIMPLE (caps), FALSE);
g_return_val_if_fail (vis_obj_seq != NULL, FALSE);
profile = gst_codec_utils_mpeg4video_get_profile (vis_obj_seq, len);
if (profile != NULL)
gst_caps_set_simple (caps, "profile", G_TYPE_STRING, profile, NULL);
level = gst_codec_utils_mpeg4video_get_level (vis_obj_seq, len);
if (level != NULL)
gst_caps_set_simple (caps, "level", G_TYPE_STRING, level, NULL);
GST_LOG ("profile : %s", (profile) ? profile : "---");
GST_LOG ("level : %s", (level) ? level : "---");
return (profile != NULL && level != NULL);
}
/**
* gst_codec_utils_opus_parse_caps:
* @caps: the #GstCaps to parse the data from
* @rate: (optional) (out): the sample rate
* @channels: (optional) (out): the number of channels
* @channel_mapping_family: (optional) (out): the channel mapping family
* @stream_count: (optional) (out): the number of independent streams
* @coupled_count: (optional) (out): the number of stereo streams
* @channel_mapping: (optional) (out) (array fixed-size=256): the mapping between the streams
*
* Parses Opus caps and fills the different fields with defaults if possible.
*
* Returns: %TRUE if parsing was successful, %FALSE otherwise.
*
* Since: 1.8
*/
gboolean
gst_codec_utils_opus_parse_caps (GstCaps * caps,
guint32 * rate,
guint8 * channels,
guint8 * channel_mapping_family,
guint8 * stream_count, guint8 * coupled_count, guint8 channel_mapping[256])
{
GstStructure *s;
gint c, f, sc, cc;
const GValue *va, *v;
g_return_val_if_fail (caps != NULL, FALSE);
g_return_val_if_fail (gst_caps_is_fixed (caps), FALSE);
g_return_val_if_fail (!gst_caps_is_empty (caps), FALSE);
s = gst_caps_get_structure (caps, 0);
g_return_val_if_fail (gst_structure_has_name (s, "audio/x-opus"), FALSE);
g_return_val_if_fail (gst_structure_has_field_typed (s,
"channel-mapping-family", G_TYPE_INT), FALSE);
if (rate) {
gint r;
if (gst_structure_get_int (s, "rate", &r))
*rate = r;
else
*rate = 48000;
}
gst_structure_get_int (s, "channel-mapping-family", &f);
if (channel_mapping_family)
*channel_mapping_family = f;
if (!gst_structure_get_int (s, "channels", &c) || c == 0) {
if (f == 0)
c = 2;
else
return FALSE;
}
if (channels)
*channels = c;
/* RTP mapping */
if (f == 0) {
if (c > 2)
return FALSE;
if (stream_count)
*stream_count = 1;
if (coupled_count)
*coupled_count = c == 2 ? 1 : 0;
if (channel_mapping) {
channel_mapping[0] = 0;
channel_mapping[1] = 1;
}
return TRUE;
}
if (!gst_structure_get_int (s, "stream-count", &sc))
return FALSE;
if (stream_count)
*stream_count = sc;
if (!gst_structure_get_int (s, "coupled-count", &cc))
return FALSE;
if (coupled_count)
*coupled_count = cc;
va = gst_structure_get_value (s, "channel-mapping");
if (!va || !G_VALUE_HOLDS (va, GST_TYPE_ARRAY))
return FALSE;
if (gst_value_array_get_size (va) != c)
return FALSE;
if (channel_mapping) {
gint i;
for (i = 0; i < c; i++) {
gint cm;
v = gst_value_array_get_value (va, i);
if (!G_VALUE_HOLDS (v, G_TYPE_INT))
return FALSE;
cm = g_value_get_int (v);
if (cm < 0 || cm > 255)
return FALSE;
channel_mapping[i] = cm;
}
}
return TRUE;
}
/**
* gst_codec_utils_opus_create_caps:
* @rate: the sample rate
* @channels: the number of channels
* @channel_mapping_family: the channel mapping family
* @stream_count: the number of independent streams
* @coupled_count: the number of stereo streams
* @channel_mapping: (nullable) (array): the mapping between the streams
*
* Creates Opus caps from the given parameters.
*
* Returns: (transfer full) (nullable): The #GstCaps, or %NULL if the parameters would lead to
* invalid Opus caps.
*
* Since: 1.8
*/
GstCaps *
gst_codec_utils_opus_create_caps (guint32 rate,
guint8 channels,
guint8 channel_mapping_family,
guint8 stream_count, guint8 coupled_count, const guint8 * channel_mapping)
{
GstCaps *caps = NULL;
GValue va = G_VALUE_INIT;
GValue v = G_VALUE_INIT;
gint i;
if (rate == 0)
rate = 48000;
if (channel_mapping_family == 0) {
if (channels > 2) {
GST_ERROR ("Invalid channels count for channel_mapping_family 0: %d",
channels);
goto done;
}
if (stream_count > 1) {
GST_ERROR ("Invalid stream count for channel_mapping_family 0: %d",
stream_count);
goto done;
}
if (coupled_count > 1) {
GST_ERROR ("Invalid coupled count for channel_mapping_family 0: %d",
coupled_count);
goto done;
}
if (channels == 0)
channels = 2;
if (stream_count == 0)
stream_count = 1;
if (coupled_count == 0)
coupled_count = channels == 2 ? 1 : 0;
return gst_caps_new_simple ("audio/x-opus",
"rate", G_TYPE_INT, rate,
"channels", G_TYPE_INT, channels,
"channel-mapping-family", G_TYPE_INT, channel_mapping_family,
"stream-count", G_TYPE_INT, stream_count,
"coupled-count", G_TYPE_INT, coupled_count, NULL);
}
if (channels == 0) {
GST_ERROR ("Invalid channels count: %d", channels);
goto done;
}
if (stream_count == 0) {
GST_ERROR ("Invalid stream count: %d", stream_count);
goto done;
}
if (coupled_count > stream_count) {
GST_ERROR ("Coupled count %d > stream count: %d", coupled_count,
stream_count);
goto done;
}
if (channel_mapping == NULL) {
GST_ERROR
("A non NULL channel-mapping is needed for channel_mapping_family != 0");
goto done;
}
caps = gst_caps_new_simple ("audio/x-opus",
"rate", G_TYPE_INT, rate,
"channels", G_TYPE_INT, channels,
"channel-mapping-family", G_TYPE_INT, channel_mapping_family,
"stream-count", G_TYPE_INT, stream_count,
"coupled-count", G_TYPE_INT, coupled_count, NULL);
g_value_init (&va, GST_TYPE_ARRAY);
g_value_init (&v, G_TYPE_INT);
for (i = 0; i < channels; i++) {
g_value_set_int (&v, channel_mapping[i]);
gst_value_array_append_value (&va, &v);
}
gst_structure_set_value (gst_caps_get_structure (caps, 0), "channel-mapping",
&va);
g_value_unset (&va);
g_value_unset (&v);
done:
return caps;
}
/*
* (really really) FIXME: move into core (dixit tpm)
*/
/*
* _gst_caps_set_buffer_array:
* @caps: (transfer full): a #GstCaps
* @field: field in caps to set
* @buf: header buffers
*
* Adds given buffers to an array of buffers set as the given @field
* on the given @caps. List of buffer arguments must be NULL-terminated.
*
* Returns: (transfer full): input caps with a streamheader field added, or NULL
* if some error occurred
*/
static GstCaps *
_gst_caps_set_buffer_array (GstCaps * caps, const gchar * field,
GstBuffer * buf, ...)
{
GstStructure *structure = NULL;
va_list va;
GValue array = { 0 };
GValue value = { 0 };
g_return_val_if_fail (caps != NULL, NULL);
g_return_val_if_fail (gst_caps_is_fixed (caps), NULL);
g_return_val_if_fail (field != NULL, NULL);
caps = gst_caps_make_writable (caps);
structure = gst_caps_get_structure (caps, 0);
g_value_init (&array, GST_TYPE_ARRAY);
va_start (va, buf);
/* put buffers in a fixed list */
while (buf) {
g_assert (gst_buffer_is_writable (buf));
/* mark buffer */
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_HEADER);
g_value_init (&value, GST_TYPE_BUFFER);
buf = gst_buffer_copy (buf);
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_HEADER);
gst_value_set_buffer (&value, buf);
gst_buffer_unref (buf);
gst_value_array_append_value (&array, &value);
g_value_unset (&value);
buf = va_arg (va, GstBuffer *);
}
va_end (va);
gst_structure_set_value (structure, field, &array);
g_value_unset (&array);
return caps;
}
/**
* gst_codec_utils_opus_create_caps_from_header:
* @header: OpusHead header
* @comments: (nullable): Comment header or NULL
*
* Creates Opus caps from the given OpusHead @header and comment header
* @comments.
*
* Returns: (transfer full) (nullable): The #GstCaps.
*
* Since: 1.8
*/
GstCaps *
gst_codec_utils_opus_create_caps_from_header (GstBuffer * header,
GstBuffer * comments)
{
GstCaps *caps;
guint32 rate;
guint8 channels;
guint8 channel_mapping_family;
guint8 stream_count;
guint8 coupled_count;
guint8 channel_mapping[256];
GstBuffer *dummy_comments = NULL;
g_return_val_if_fail (GST_IS_BUFFER (header), NULL);
g_return_val_if_fail (comments == NULL || GST_IS_BUFFER (comments), NULL);
if (!gst_codec_utils_opus_parse_header (header, &rate, &channels,
&channel_mapping_family, &stream_count, &coupled_count,
channel_mapping, NULL, NULL))
return NULL;
if (!(caps =
gst_codec_utils_opus_create_caps (rate, channels,
channel_mapping_family, stream_count, coupled_count,
channel_mapping)))
return NULL;
if (!comments) {
GstTagList *tags = gst_tag_list_new_empty ();
dummy_comments =
gst_tag_list_to_vorbiscomment_buffer (tags, (const guint8 *) "OpusTags",
8, NULL);
gst_tag_list_unref (tags);
}
_gst_caps_set_buffer_array (caps, "streamheader", header,
comments ? comments : dummy_comments, NULL);
if (dummy_comments)
gst_buffer_unref (dummy_comments);
return caps;
}
/**
* gst_codec_utils_opus_create_header:
* @rate: the sample rate
* @channels: the number of channels
* @channel_mapping_family: the channel mapping family
* @stream_count: the number of independent streams
* @coupled_count: the number of stereo streams
* @channel_mapping: (nullable) (array): the mapping between the streams
* @pre_skip: Pre-skip in 48kHz samples or 0
* @output_gain: Output gain or 0
*
* Creates OpusHead header from the given parameters.
*
* Returns: (transfer full) (nullable): The #GstBuffer containing the OpusHead.
*
* Since: 1.8
*/
GstBuffer *
gst_codec_utils_opus_create_header (guint32 rate,
guint8 channels,
guint8 channel_mapping_family,
guint8 stream_count,
guint8 coupled_count,
const guint8 * channel_mapping, guint16 pre_skip, gint16 output_gain)
{
GstBuffer *buffer;
GstByteWriter bw;
gboolean hdl = TRUE;
if (rate == 0)
rate = 48000;
if (channel_mapping_family == 0) {
g_return_val_if_fail (channels <= 2, NULL);
if (channels == 0)
channels = 2;
g_return_val_if_fail (stream_count == 0 || stream_count == 1, NULL);
if (stream_count == 0)
stream_count = 1;
g_return_val_if_fail (coupled_count == 0 || coupled_count == 1, NULL);
if (coupled_count == 0)
coupled_count = channels == 2 ? 1 : 0;
channel_mapping = NULL;
} else {
g_return_val_if_fail (channels > 0, NULL);
g_return_val_if_fail (stream_count > 0, NULL);
g_return_val_if_fail (coupled_count <= stream_count, NULL);
g_return_val_if_fail (channel_mapping != NULL, NULL);
}
gst_byte_writer_init (&bw);
/* See http://wiki.xiph.org/OggOpus */
hdl &= gst_byte_writer_put_data (&bw, (const guint8 *) "OpusHead", 8);
hdl &= gst_byte_writer_put_uint8 (&bw, 0x01); /* version number */
hdl &= gst_byte_writer_put_uint8 (&bw, channels);
hdl &= gst_byte_writer_put_uint16_le (&bw, pre_skip);
hdl &= gst_byte_writer_put_uint32_le (&bw, rate);
hdl &= gst_byte_writer_put_uint16_le (&bw, output_gain);
hdl &= gst_byte_writer_put_uint8 (&bw, channel_mapping_family);
if (channel_mapping_family > 0) {
hdl &= gst_byte_writer_put_uint8 (&bw, stream_count);
hdl &= gst_byte_writer_put_uint8 (&bw, coupled_count);
hdl &= gst_byte_writer_put_data (&bw, channel_mapping, channels);
}
if (!hdl) {
GST_WARNING ("Error creating header");
gst_byte_writer_reset (&bw);
return NULL;
}
buffer = gst_byte_writer_reset_and_get_buffer (&bw);
GST_BUFFER_OFFSET (buffer) = 0;
GST_BUFFER_OFFSET_END (buffer) = 0;
return buffer;
}
/**
* gst_codec_utils_opus_parse_header:
* @header: the OpusHead #GstBuffer
* @rate: (optional) (out): the sample rate
* @channels: (optional) (out): the number of channels
* @channel_mapping_family: (optional) (out): the channel mapping family
* @stream_count: (optional) (out): the number of independent streams
* @coupled_count: (optional) (out): the number of stereo streams
* @channel_mapping: (optional) (out) (array fixed-size=256): the mapping between the streams
* @pre_skip: (optional) (out): Pre-skip in 48kHz samples or 0
* @output_gain: (optional) (out): Output gain or 0
*
* Parses the OpusHead header.
*
* Returns: %TRUE if parsing was successful, %FALSE otherwise.
*
* Since: 1.8
*/
gboolean
gst_codec_utils_opus_parse_header (GstBuffer * header,
guint32 * rate,
guint8 * channels,
guint8 * channel_mapping_family,
guint8 * stream_count,
guint8 * coupled_count,
guint8 channel_mapping[256], guint16 * pre_skip, gint16 * output_gain)
{
GstByteReader br;
GstMapInfo map;
gboolean ret = TRUE;
guint8 c, f, version;
g_return_val_if_fail (GST_IS_BUFFER (header), FALSE);
g_return_val_if_fail (gst_buffer_get_size (header) >= 19, FALSE);
if (!gst_buffer_map (header, &map, GST_MAP_READ))
return FALSE;
gst_byte_reader_init (&br, map.data, map.size);
/* See http://wiki.xiph.org/OggOpus */
if (memcmp (gst_byte_reader_get_data_unchecked (&br, 8), "OpusHead", 8) != 0) {
ret = FALSE;
goto done;
}
version = gst_byte_reader_get_uint8_unchecked (&br);
if (version == 0x00)
GST_ERROR ("Opus Header version is wrong, should be 0x01 and not 0x00");
else if (version != 0x01) {
ret = FALSE;
goto done;
}
c = gst_byte_reader_get_uint8_unchecked (&br);
if (channels)
*channels = c;
if (pre_skip)
*pre_skip = gst_byte_reader_get_uint16_le_unchecked (&br);
else
gst_byte_reader_skip_unchecked (&br, 2);
if (rate)
*rate = gst_byte_reader_get_uint32_le_unchecked (&br);
else
gst_byte_reader_skip_unchecked (&br, 4);
if (output_gain)
*output_gain = gst_byte_reader_get_uint16_le_unchecked (&br);
else
gst_byte_reader_skip_unchecked (&br, 2);
f = gst_byte_reader_get_uint8_unchecked (&br);
if (channel_mapping_family)
*channel_mapping_family = f;
if (f == 0 && c <= 2) {
if (stream_count)
*stream_count = 1;
if (coupled_count)
*coupled_count = c == 2 ? 1 : 0;
if (channel_mapping) {
channel_mapping[0] = 0;
channel_mapping[1] = 1;
}
goto done;
}
if (gst_byte_reader_get_remaining (&br) < 2 + c) {
ret = FALSE;
goto done;
}
if (stream_count)
*stream_count = gst_byte_reader_get_uint8_unchecked (&br);
else
gst_byte_reader_skip_unchecked (&br, 1);
if (coupled_count)
*coupled_count = gst_byte_reader_get_uint8_unchecked (&br);
else
gst_byte_reader_skip_unchecked (&br, 1);
if (channel_mapping)
memcpy (channel_mapping, gst_byte_reader_get_data_unchecked (&br, c), c);
done:
gst_buffer_unmap (header, &map);
return ret;
}
static gboolean
h264_caps_structure_get_profile_flags_level (GstStructure * caps_st,
guint8 * profile, guint8 * flags, guint8 * level)
{
const GValue *codec_data_value = NULL;
GstBuffer *codec_data = NULL;
GstMapInfo map;
gboolean ret = FALSE;
guint8 *data = NULL;
gsize size;
codec_data_value = gst_structure_get_value (caps_st, "codec_data");
if (!codec_data_value) {
GST_DEBUG
("video/x-h264 caps did not have codec_data set, cannot parse profile, flags and level");
return FALSE;
}
codec_data = gst_value_get_buffer (codec_data_value);
if (!gst_buffer_map (codec_data, &map, GST_MAP_READ)) {
return FALSE;
}
data = map.data;
size = map.size;
if (!gst_codec_utils_h264_get_profile_flags_level (data, (guint) size,
profile, flags, level)) {
GST_WARNING
("Failed to parse profile, flags and level from h264 codec data");
goto done;
}
ret = TRUE;
done:
gst_buffer_unmap (codec_data, &map);
return ret;
}
static gboolean
aac_caps_structure_get_audio_object_type (GstStructure * caps_st,
guint8 * audio_object_type)
{
gboolean ret = FALSE;
const GValue *codec_data_value = NULL;
GstBuffer *codec_data = NULL;
GstMapInfo map;
guint8 *data = NULL;
gsize size;
GstBitReader br;
codec_data_value = gst_structure_get_value (caps_st, "codec_data");
if (!codec_data_value) {
GST_DEBUG
("audio/mpeg pad did not have codec_data set, cannot parse audio object type");
return FALSE;
}
codec_data = gst_value_get_buffer (codec_data_value);
if (!gst_buffer_map (codec_data, &map, GST_MAP_READ)) {
return FALSE;
}
data = map.data;
size = map.size;
if (size < 2) {
GST_WARNING ("aac codec data is too small");
goto done;
}
gst_bit_reader_init (&br, data, size);
ret = gst_codec_utils_aac_get_audio_object_type (&br, audio_object_type);
done:
gst_buffer_unmap (codec_data, &map);
return ret;
}
static gboolean
hevc_caps_get_mime_codec (GstCaps * caps, gchar ** mime_codec)
{
GstStructure *caps_st = NULL;
const GValue *codec_data_value = NULL;
GstBuffer *codec_data = NULL;
GstMapInfo map;
gboolean ret = FALSE;
const gchar *stream_format;
guint8 *data = NULL;
gsize size;
guint16 profile_space;
guint8 tier_flag;
guint16 profile_idc;
guint32 compat_flags;
guchar constraint_indicator_flags[6];
guint8 level_idc;
guint32 compat_flag_parameter = 0;
GString *codec_string;
const guint8 *profile_tier_level;
gint last_flag_index;
caps_st = gst_caps_get_structure (caps, 0);
codec_data_value = gst_structure_get_value (caps_st, "codec_data");
stream_format = gst_structure_get_string (caps_st, "stream-format");
if (!codec_data_value) {
GST_DEBUG ("video/x-h265 caps did not have codec_data set, cannot parse");
return FALSE;
} else if (!stream_format) {
GST_DEBUG
("video/x-h265 caps did not have stream-format set, cannot parse");
return FALSE;
}
codec_data = gst_value_get_buffer (codec_data_value);
if (!gst_buffer_map (codec_data, &map, GST_MAP_READ)) {
return FALSE;
}
data = map.data;
size = map.size;
/* HEVCDecoderConfigurationRecord is at a minimum 23 bytes long */
if (size < 23) {
GST_DEBUG ("Incomplete HEVCDecoderConfigurationRecord");
goto done;
}
if (!g_str_equal (stream_format, "hev1")
&& !g_str_equal (stream_format, "hvc1")) {
GST_DEBUG ("Unknown stream-format %s", stream_format);
goto done;
}
profile_tier_level = data + 1;
profile_space = (profile_tier_level[0] & 0x11) >> 6;
tier_flag = (profile_tier_level[0] & 0x001) >> 5;
profile_idc = (profile_tier_level[0] & 0x1f);
compat_flags = GST_READ_UINT32_BE (data + 2);
for (unsigned i = 0; i < 6; ++i)
constraint_indicator_flags[i] = GST_READ_UINT8 (data + 6 + i);
level_idc = data[12];
/* The 32 bits of the compat_flags, but in reverse bit order */
compat_flags =
((compat_flags & 0xaaaaaaaa) >> 1) | ((compat_flags & 0x55555555) << 1);
compat_flags =
((compat_flags & 0xcccccccc) >> 2) | ((compat_flags & 0x33333333) << 2);
compat_flags =
((compat_flags & 0xf0f0f0f0) >> 4) | ((compat_flags & 0x0f0f0f0f) << 4);
compat_flags =
((compat_flags & 0xff00ff00) >> 8) | ((compat_flags & 0x00ff00ff) << 8);
compat_flag_parameter = (compat_flags >> 16) | (compat_flags << 16);
codec_string = g_string_new (stream_format);
codec_string = g_string_append_c (codec_string, '.');
if (profile_space)
codec_string = g_string_append_c (codec_string, 'A' + profile_space - 1);
g_string_append_printf (codec_string, "%" G_GUINT16_FORMAT ".%X.%c%d",
profile_idc, compat_flag_parameter, tier_flag ? 'H' : 'L', level_idc);
/* Each of the 6 bytes of the constraint flags, starting from the byte containing the
* progressive_source_flag, each encoded as a hexadecimal number, and the encoding
* of each byte separated by a period; trailing bytes that are zero may be omitted.
*/
last_flag_index = 5;
while (last_flag_index >= 0
&& (int) (constraint_indicator_flags[last_flag_index]) == 0)
--last_flag_index;
for (gint i = 0; i <= last_flag_index; ++i) {
g_string_append_printf (codec_string, ".%02X",
constraint_indicator_flags[i]);
}
*mime_codec = g_string_free (codec_string, FALSE);
ret = TRUE;
done:
gst_buffer_unmap (codec_data, &map);
return ret;
}
/* https://www.webmproject.org/vp9/mp4/#codecs-parameter-string */
static char *
vp9_caps_get_mime_codec (GstCaps * caps)
{
GstStructure *caps_st;
const char *profile_str, *chroma_format_str, *colorimetry_str;
guint bitdepth_luma, bitdepth_chroma;
guint8 profile = -1, chroma_format = -1, level = -1, color_primaries =
-1, color_transfer = -1, color_matrix = -1;
gboolean video_full_range;
GstVideoColorimetry cinfo = { 0, };
GString *codec_string;
caps_st = gst_caps_get_structure (caps, 0);
codec_string = g_string_new ("vp09");
profile_str = gst_structure_get_string (caps_st, "profile");
if (g_strcmp0 (profile_str, "0") == 0) {
profile = 0;
} else if (g_strcmp0 (profile_str, "1") == 0) {
profile = 1;
} else if (g_strcmp0 (profile_str, "2") == 0) {
profile = 2;
} else if (g_strcmp0 (profile_str, "3") == 0) {
profile = 3;
} else {
goto done;
}
/* XXX: hardcoded level */
level = 10;
gst_structure_get (caps_st, "bit-depth-luma", G_TYPE_UINT,
&bitdepth_luma, "bit-depth-chroma", G_TYPE_UINT, &bitdepth_chroma, NULL);
if (bitdepth_luma == 0)
goto done;
if (bitdepth_luma != bitdepth_chroma)
goto done;
/* mandatory elements */
g_string_append_printf (codec_string, ".%02u.%02u.%02u", profile, level,
bitdepth_luma);
colorimetry_str = gst_structure_get_string (caps_st, "colorimetry");
if (!colorimetry_str)
goto done;
if (!gst_video_colorimetry_from_string (&cinfo, colorimetry_str))
goto done;
video_full_range = cinfo.range == GST_VIDEO_COLOR_RANGE_0_255;
chroma_format_str = gst_structure_get_string (caps_st, "chroma-format");
if (g_strcmp0 (chroma_format_str, "4:2:0") == 0) {
const char *chroma_site_str;
GstVideoChromaSite chroma_site;
chroma_site_str = gst_structure_get_string (caps_st, "chroma-site");
if (chroma_site_str)
chroma_site = gst_video_chroma_site_from_string (chroma_site_str);
else
chroma_site = GST_VIDEO_CHROMA_SITE_UNKNOWN;
if (chroma_site == GST_VIDEO_CHROMA_SITE_V_COSITED) {
chroma_format = 0;
} else if (chroma_site == GST_VIDEO_CHROMA_SITE_COSITED) {
chroma_format = 1;
} else {
chroma_format = 1;
}
} else if (g_strcmp0 (chroma_format_str, "4:2:2") == 0) {
chroma_format = 2;
} else if (g_strcmp0 (chroma_format_str, "4:4:4") == 0) {
chroma_format = 3;
} else {
goto done;
}
/* optional but all or nothing. Include them if any parameter differs from the default value */
color_primaries = gst_video_color_primaries_to_iso (cinfo.primaries);
color_transfer = gst_video_transfer_function_to_iso (cinfo.transfer);
color_matrix = gst_video_color_matrix_to_iso (cinfo.matrix);
if (chroma_format != 1 || color_primaries != 1 || color_transfer != 1
|| color_matrix != 1 || video_full_range) {
g_string_append_printf (codec_string, ".%02u.%02u.%02u.%02u.%02u",
chroma_format, color_primaries, color_transfer, color_matrix,
video_full_range);
}
done:
return g_string_free (codec_string, FALSE);
}
/**
* gst_codec_utils_caps_get_mime_codec:
* @caps: A #GstCaps to convert to mime codec
*
* Converts @caps to a RFC 6381 compatible codec string if possible.
*
* Useful for providing the 'codecs' field inside the 'Content-Type' HTTP
* header for containerized formats, such as mp4 or matroska.
*
* Registered codecs can be found at http://mp4ra.org/#/codecs
*
* Returns: (transfer full) (nullable): a RFC 6381 compatible codec string or %NULL
*
* Since: 1.20
*/
gchar *
gst_codec_utils_caps_get_mime_codec (GstCaps * caps)
{
gchar *mime_codec = NULL;
GstStructure *caps_st = NULL;
const gchar *media_type = NULL;
g_return_val_if_fail (caps != NULL, NULL);
g_return_val_if_fail (gst_caps_is_fixed (caps), NULL);
caps_st = gst_caps_get_structure (caps, 0);
if (caps_st == NULL) {
GST_WARNING ("Failed to get structure from caps");
goto done;
}
media_type = gst_structure_get_name (caps_st);
if (g_strcmp0 (media_type, "video/x-h264") == 0) {
/* avc1.AABBCC
* AA = profile
* BB = constraint set flags
* CC = level
*/
guint8 profile = 0;
guint8 flags = 0;
guint8 level = 0;
if (!h264_caps_structure_get_profile_flags_level (caps_st, &profile, &flags,
&level)) {
GST_DEBUG
("h264 caps did not contain 'codec_data', cannot determine detailed codecs info");
mime_codec = g_strdup ("avc1");
} else {
mime_codec = g_strdup_printf ("avc1.%02X%02X%02X", profile, flags, level);
}
} else if (g_strcmp0 (media_type, "video/x-h265") == 0) {
if (!hevc_caps_get_mime_codec (caps, &mime_codec)) {
GST_DEBUG ("h265 caps parsing failed");
mime_codec = g_strdup ("hev1");
}
} else if (g_strcmp0 (media_type, "video/x-av1") == 0) {
/* TODO: Some browsers won't play the video unless more codec information is
* available in the mime codec for av1. This is documented in
* https://aomediacodec.github.io/av1-isobmff/#codecsparam */
mime_codec = g_strdup ("av01");
} else if (g_strcmp0 (media_type, "video/x-vp8") == 0) {
/* TODO: most browsers won't play the video unless more codec information is
* available in the mime codec for vp8. */
mime_codec = g_strdup ("vp08");
} else if (g_strcmp0 (media_type, "video/x-vp9") == 0) {
mime_codec = vp9_caps_get_mime_codec (caps);
} else if (g_strcmp0 (media_type, "image/jpeg") == 0) {
mime_codec = g_strdup ("mjpg");
} else if (g_strcmp0 (media_type, "audio/mpeg") == 0) {
guint8 audio_object_type = 0;
if (aac_caps_structure_get_audio_object_type (caps_st, &audio_object_type)) {
mime_codec = g_strdup_printf ("mp4a.40.%u", audio_object_type);
} else {
mime_codec = g_strdup ("mp4a.40");
}
} else if (g_strcmp0 (media_type, "audio/x-opus") == 0) {
mime_codec = g_strdup ("opus");
} else if (g_strcmp0 (media_type, "audio/x-mulaw") == 0) {
mime_codec = g_strdup ("ulaw");
} else if (g_strcmp0 (media_type, "audio/x-adpcm") == 0) {
if (g_strcmp0 (gst_structure_get_string (caps_st, "layout"), "g726") == 0) {
mime_codec = g_strdup ("g726");
}
}
done:
return mime_codec;
}
static GstCaps *
gst_codec_utils_caps_from_mime_codec_single (const gchar * codec)
{
GstCaps *caps = NULL;
gchar **subcodec = NULL;
gchar *subcodec0;
guint32 codec_fourcc;
GST_DEBUG ("Analyzing codec '%s'", codec);
/* rfc 6381 3.3
*
* For the ISO Base Media File Format, and the QuickTime movie file
* format, the first element of a 'codecs' parameter value is a sample
* description entry four-character code as registered by the MP4
* Registration Authority [MP4RA].
*
* See Also : http://mp4ra.org/#/codecs
*/
if (strlen (codec) < 4) {
GST_WARNING ("Invalid codec (smaller than 4 characters) : '%s'", codec);
goto beach;
}
subcodec = g_strsplit (codec, ".", 0);
subcodec0 = subcodec[0];
if (subcodec0 == NULL)
goto beach;
/* Skip any leading spaces */
while (*subcodec0 == ' ')
subcodec0++;
if (strlen (subcodec0) < 4) {
GST_WARNING ("Invalid codec (smaller than 4 characters) : '%s'", subcodec0);
goto beach;
}
GST_LOG ("subcodec[0] '%s'", subcodec0);
codec_fourcc = GST_READ_UINT32_LE (subcodec0);
switch (codec_fourcc) {
case GST_MAKE_FOURCC ('a', 'v', 'c', '1'):
case GST_MAKE_FOURCC ('a', 'v', 'c', '2'):
case GST_MAKE_FOURCC ('a', 'v', 'c', '3'):
case GST_MAKE_FOURCC ('a', 'v', 'c', '4'):
{
guint8 sps[3];
guint64 spsint64;
/* ISO 14496-15 Annex E : Sub-parameters for the MIME type “codecs”
* parameter */
caps = gst_caps_new_empty_simple ("video/x-h264");
if (subcodec[1]) {
/* The second element is the hexadecimal representation of the following
* three bytes in the (subset) sequence parameter set Network
* Abstraction Layer (NAL) unit specified in [AVC]:
* * profile_idc
* * constraint_set flags
* * level_idc
* */
spsint64 = g_ascii_strtoull (subcodec[1], NULL, 16);
sps[0] = spsint64 >> 16;
sps[1] = (spsint64 >> 8) & 0xff;
sps[2] = spsint64 & 0xff;
gst_codec_utils_h264_caps_set_level_and_profile (caps,
(const guint8 *) &sps, 3);
}
}
break;
case GST_MAKE_FOURCC ('m', 'p', '4', 'a'):
{
guint64 oti;
if (!subcodec[1])
break;
oti = g_ascii_strtoull (subcodec[1], NULL, 16);
/* For mp4a, mp4v and mp4s, the second element is the hexadecimal
* representation of the MP4 Registration Authority
* ObjectTypeIndication */
switch (oti) {
case 0x40:
{
guint64 audio_oti;
const gchar *profile = NULL;
/* MPEG-4 Audio (ISO/IEC 14496-3 */
caps =
gst_caps_new_simple ("audio/mpeg", "mpegversion", G_TYPE_INT, 4,
NULL);
if (!subcodec[2])
break;
/* If present, last element is the audio object type */
audio_oti = g_ascii_strtoull (subcodec[2], NULL, 16);
switch (audio_oti) {
case 1:
profile = "main";
break;
case 2:
profile = "lc";
break;
case 3:
profile = "ssr";
break;
case 4:
profile = "ltp";
break;
default:
GST_WARNING ("Unhandled MPEG-4 Audio Object Type: 0x%"
G_GUINT64_FORMAT "x", audio_oti);
break;
}
if (profile)
gst_caps_set_simple (caps, "profile", G_TYPE_STRING, profile, NULL);
break;
}
default:
GST_WARNING ("Unknown ObjectTypeIndication 0x%" G_GUINT64_FORMAT "x",
oti);
break;
}
}
break;
case GST_MAKE_FOURCC ('h', 'e', 'v', '1'):
case GST_MAKE_FOURCC ('h', 'v', 'c', '1'):
{
/* ISO 14496-15 Annex E : Sub-parameters for the MIME type “codecs”
* parameter */
caps = gst_caps_new_empty_simple ("video/x-h265");
/* FIXME : Extract information from the following component */
break;
}
/* Following are not defined in rfc 6831 but are registered MP4RA codecs */
case GST_MAKE_FOURCC ('a', 'c', '-', '3'):
/* ETSI TS 102 366 v1.4.1 - Digital Audio Compression (AC-3, Enhanced AC-3) Standard, Annex F */
caps = gst_caps_new_empty_simple ("audio/x-ac3");
break;
case GST_MAKE_FOURCC ('e', 'c', '+', '3'):
GST_FIXME
("Signalling of ATMOS ('ec+3') isn't defined yet. Falling back to EAC3 caps");
/* withdrawn, unused, do not use (was enhanced AC-3 audio with JOC) */
case GST_MAKE_FOURCC ('e', 'c', '-', '3'):
/* ETSI TS 102 366 v1.4.1 - Digital Audio Compression (AC-3, Enhanced AC-3) Standard, Annex F */
caps = gst_caps_new_empty_simple ("audio/x-eac3");
break;
case GST_MAKE_FOURCC ('s', 't', 'p', 'p'):
/* IMSC1-conformant TTM XML */
caps = gst_caps_new_empty_simple ("application/ttml+xml");
break;
case GST_MAKE_FOURCC ('w', 'v', 't', 't'):
/* WebVTT subtitles */
caps = gst_caps_new_empty_simple ("application/x-subtitle-vtt");
break;
case GST_MAKE_FOURCC ('v', 'p', '0', '8'):
/* VP8 */
caps = gst_caps_new_empty_simple ("video/x-vp8");
break;
case GST_MAKE_FOURCC ('v', 'p', '0', '9'):
/* VP9 */
caps = gst_caps_new_empty_simple ("video/x-vp9");
break;
case GST_MAKE_FOURCC ('a', 'v', '0', '1'):
/* AV1 */
caps = gst_caps_new_empty_simple ("video/x-av1");
break;
case GST_MAKE_FOURCC ('o', 'p', 'u', 's'):
/* Opus */
caps = gst_caps_new_empty_simple ("audio/x-opus");
break;
case GST_MAKE_FOURCC ('u', 'l', 'a', 'w'):
/* ulaw */
caps = gst_caps_new_empty_simple ("audio/x-mulaw");
break;
case GST_MAKE_FOURCC ('g', '7', '2', '6'):
/* ulaw */
caps =
gst_caps_new_simple ("audio/x-adpcm", "layout", G_TYPE_STRING, "g726",
NULL);
break;
default:
GST_WARNING ("Unknown codec '%s' please file a bug", codec);
break;
}
beach:
if (subcodec != NULL)
g_strfreev (subcodec);
return caps;
}
/**
* gst_codec_utils_caps_from_mime_codec:
* @codecs_field: A mime codec string field
*
* Converts a RFC 6381 compatible codec string to #GstCaps. More than one codec
* string can be present (separated by `,`).
*
* Registered codecs can be found at http://mp4ra.org/#/codecs
*
* Returns: (transfer full) (nullable): The corresponding #GstCaps or %NULL
*
* Since: 1.22
*/
GstCaps *
gst_codec_utils_caps_from_mime_codec (const gchar * codecs_field)
{
gchar **codecs = NULL;
GstCaps *caps = NULL;
guint i;
g_return_val_if_fail (codecs_field != NULL, NULL);
GST_LOG ("codecs_field '%s'", codecs_field);
codecs = g_strsplit (codecs_field, ",", 0);
if (codecs == NULL) {
GST_WARNING ("Invalid 'codecs' field : '%s'", codecs_field);
goto beach;
}
for (i = 0; codecs[i]; i++) {
const gchar *codec = codecs[i];
if (caps == NULL)
caps = gst_codec_utils_caps_from_mime_codec_single (codec);
else
gst_caps_append (caps,
gst_codec_utils_caps_from_mime_codec_single (codec));
}
beach:
g_strfreev (codecs);
GST_LOG ("caps %" GST_PTR_FORMAT, caps);
return caps;
}
Reference in a new issue View git blame Copy permalink