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Modernizing the documentation, making it simpler to read an modify and allowing us to possibly switch to hotdoc in the future.
1644 lines
45 KiB
C
1644 lines
45 KiB
C
/* GStreamer base utils library codec-specific utility functions
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* Copyright (C) 2010 Arun Raghavan <arun.raghavan@collabora.co.uk>
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* 2013 Sreerenj Balachandran <sreerenj.balachandran@intel.com>
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* 2010 Collabora Multimedia
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* 2010 Nokia Corporation
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* 2013 Intel Corporation
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* 2015 Sebastian Dröge <sebastian@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:gstpbutilscodecutils
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* @title: Codec utilities
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* @short_description: Miscellaneous codec-specific utility functions
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*
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* Provides codec-specific ulility functions such as functions to provide the
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* codec profile and level in human-readable string form from header data.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "pbutils.h"
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#include <gst/base/base.h>
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#include <gst/tag/tag.h>
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#include <string.h>
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#define GST_SIMPLE_CAPS_HAS_NAME(caps,name) \
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gst_structure_has_name(gst_caps_get_structure((caps),0),(name))
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#define GST_SIMPLE_CAPS_HAS_FIELD(caps,field) \
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gst_structure_has_field(gst_caps_get_structure((caps),0),(field))
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static const guint aac_sample_rates[] = { 96000, 88200, 64000, 48000, 44100,
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32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350
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};
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static const gchar *
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digit_to_string (guint digit)
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{
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static const char itoa[][2] = {
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"0", "1", "2", "3", "4", "5", "6", "7", "8", "9"
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};
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if (G_LIKELY (digit < 10))
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return itoa[digit];
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else
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return NULL;
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}
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/**
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* gst_codec_utils_aac_get_sample_rate_from_index:
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* @sr_idx: Sample rate index as from the AudioSpecificConfig (MPEG-4
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* container) or ADTS frame header
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*
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* Translates the sample rate index found in AAC headers to the actual sample
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* rate.
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*
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* Returns: The sample rate if @sr_idx is valid, 0 otherwise.
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*/
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guint
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gst_codec_utils_aac_get_sample_rate_from_index (guint sr_idx)
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{
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if (G_LIKELY (sr_idx < G_N_ELEMENTS (aac_sample_rates)))
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return aac_sample_rates[sr_idx];
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GST_WARNING ("Invalid sample rate index %u", sr_idx);
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return 0;
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}
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/**
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* gst_codec_utils_aac_get_index_from_sample_rate:
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* @rate: Sample rate
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*
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* Translates the sample rate to the index corresponding to it in AAC spec.
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*
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* Returns: The AAC index for this sample rate, -1 if the rate is not a
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* valid AAC sample rate.
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*/
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gint
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gst_codec_utils_aac_get_index_from_sample_rate (guint rate)
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{
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guint n;
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for (n = 0; n < G_N_ELEMENTS (aac_sample_rates); n++)
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if (aac_sample_rates[n] == rate)
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return n;
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GST_WARNING ("Invalid sample rate %u", rate);
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return -1;
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}
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/**
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* gst_codec_utils_aac_get_sample_rate:
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* @audio_config: a pointer to the AudioSpecificConfig as specified in the
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* Elementary Stream Descriptor (esds) in ISO/IEC 14496-1.
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* @len: Length of @audio_config in bytes
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*
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* Translates the sample rate index found in AAC headers to the actual sample
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* rate.
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*
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* Returns: The sample rate if sr_idx is valid, 0 otherwise.
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*
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* Since 1.10
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*/
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guint
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gst_codec_utils_aac_get_sample_rate (const guint8 * audio_config, guint len)
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{
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guint rate_index;
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if (len < 2)
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return 0;
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rate_index = ((audio_config[0] & 0x7) << 1) | ((audio_config[1] & 0x80) >> 7);
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return gst_codec_utils_aac_get_sample_rate_from_index (rate_index);
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}
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/**
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* gst_codec_utils_aac_get_channels:
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* @audio_config: a pointer to the AudioSpecificConfig as specified in the
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* Elementary Stream Descriptor (esds) in ISO/IEC 14496-1.
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*
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* Returns the channels of the given AAC stream.
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*
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* Returns: The channels or 0 if the channel could not be determined.
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*
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* Since 1.10
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*/
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guint
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gst_codec_utils_aac_get_channels (const guint8 * audio_config, guint len)
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{
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guint channels;
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if (len < 2)
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return 0;
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channels = (audio_config[1] & 0x7f) >> 3;
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if (channels > 0 && channels < 7)
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return channels;
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else if (channels == 7)
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return 8;
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else
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return 0;
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}
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/**
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* gst_codec_utils_aac_get_profile:
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* @audio_config: a pointer to the AudioSpecificConfig as specified in the
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* Elementary Stream Descriptor (esds) in ISO/IEC 14496-1 (see
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* gst_codec_utils_aac_get_level() for a more details).
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* @len: Length of @audio_config in bytes
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*
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* Returns the profile of the given AAC stream as a string. The profile is
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* determined using the AudioObjectType field which is in the first 5 bits of
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* @audio_config.
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*
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* > HE-AAC support has not yet been implemented.
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*
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* Returns: The profile as a const string and %NULL if the profile could not be
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* determined.
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*/
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const gchar *
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gst_codec_utils_aac_get_profile (const guint8 * audio_config, guint len)
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{
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guint profile;
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if (len < 1)
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return NULL;
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GST_MEMDUMP ("audio config", audio_config, len);
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profile = audio_config[0] >> 3;
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switch (profile) {
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case 1:
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return "main";
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case 2:
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return "lc";
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case 3:
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return "ssr";
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case 4:
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return "ltp";
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default:
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break;
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}
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GST_DEBUG ("Invalid profile idx: %u", profile);
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return NULL;
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}
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/**
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* gst_codec_utils_aac_get_level:
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* @audio_config: a pointer to the AudioSpecificConfig as specified in the
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* Elementary Stream Descriptor (esds) in ISO/IEC 14496-1.
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* @len: Length of @audio_config in bytes
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*
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* Determines the level of a stream as defined in ISO/IEC 14496-3. For AAC LC
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* streams, the constraints from the AAC audio profile are applied. For AAC
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* Main, LTP, SSR and others, the Main profile is used.
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*
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* The @audio_config parameter follows the following format, starting from the
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* most significant bit of the first byte:
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*
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* * Bit 0:4 contains the AudioObjectType
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* * Bit 5:8 contains the sample frequency index (if this is 0xf, then the
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* next 24 bits define the actual sample frequency, and subsequent
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* fields are appropriately shifted).
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* * Bit 9:12 contains the channel configuration
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*
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* > HE-AAC support has not yet been implemented.
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*
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* Returns: The level as a const string and %NULL if the level could not be
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* determined.
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*/
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const gchar *
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gst_codec_utils_aac_get_level (const guint8 * audio_config, guint len)
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{
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int profile, sr_idx, channel_config, rate;
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/* Number of single channel elements, channel pair elements, low frequency
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* elements, independently switched coupling channel elements, and
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* dependently switched coupling channel elements.
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*
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* Note: The 2 CCE types are ignored for now as they require us to actually
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* parse the first frame, and they are rarely found in actual streams.
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*/
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int num_sce = 0, num_cpe = 0, num_lfe = 0, num_cce_indep = 0, num_cce_dep = 0;
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int num_channels;
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/* Processor and RAM Complexity Units (calculated and "reference" for single
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* channel) */
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int pcu, rcu, pcu_ref, rcu_ref;
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int ret = -1;
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g_return_val_if_fail (audio_config != NULL, NULL);
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if (len < 2)
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return NULL;
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GST_MEMDUMP ("audio config", audio_config, len);
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profile = audio_config[0] >> 3;
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/* FIXME: add support for sr_idx = 0xf */
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sr_idx = ((audio_config[0] & 0x7) << 1) | ((audio_config[1] & 0x80) >> 7);
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rate = gst_codec_utils_aac_get_sample_rate_from_index (sr_idx);
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channel_config = (audio_config[1] & 0x7f) >> 3;
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if (rate == 0)
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return NULL;
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switch (channel_config) {
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case 0:
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/* Channel config is defined in the AudioObjectType's SpecificConfig,
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* which requires some amount of digging through the headers. I only see
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* this done in the MPEG conformance streams - FIXME */
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GST_WARNING ("Found a stream with channel configuration in the "
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"AudioSpecificConfig. Please file a bug with a link to the media if "
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"possible.");
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return NULL;
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case 1:
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/* front center */
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num_sce = 1;
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break;
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case 2:
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/* front left and right */
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num_cpe = 1;
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break;
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case 3:
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/* front left, right, and center */
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num_sce = 1;
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num_cpe = 1;
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break;
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case 4:
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/* front left, right, and center; rear surround */
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num_sce = 2;
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num_cpe = 1;
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break;
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case 5:
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/* front left, right, and center; rear left and right surround */
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num_sce = 1;
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num_cpe = 2;
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break;
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case 6:
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/* front left, right, center and LFE; rear left and right surround */
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num_sce = 1;
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num_cpe = 2;
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break;
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case 7:
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case 12:
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case 14:
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/* front left, right, center and LFE; outside front left and right;
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* rear left and right surround */
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num_sce = 1;
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num_cpe = 3;
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num_lfe = 1;
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break;
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case 11:
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num_sce = 2;
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num_cpe = 2;
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num_lfe = 1;
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break;
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default:
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GST_WARNING ("Unknown channel config in header: %d", channel_config);
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return NULL;
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}
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switch (profile) {
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case 0: /* NULL */
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GST_WARNING ("profile 0 is not a valid profile");
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return NULL;
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case 2: /* LC */
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pcu_ref = 3;
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rcu_ref = 3;
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break;
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case 3: /* SSR */
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pcu_ref = 4;
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rcu_ref = 3;
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break;
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case 4: /* LTP */
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pcu_ref = 4;
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rcu_ref = 4;
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break;
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case 1: /* Main */
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default:
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/* Other than a couple of ER profiles, Main is the worst-case */
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pcu_ref = 5;
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rcu_ref = 5;
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break;
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}
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/* "fs_ref" is 48000 Hz for AAC Main/LC/SSR/LTP. SBR's fs_ref is defined as
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* 24000/48000 (in/out), for SBR streams. Actual support is a FIXME */
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pcu = ((float) rate / 48000) * pcu_ref *
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((2 * num_cpe) + num_sce + num_lfe + num_cce_indep + (0.3 * num_cce_dep));
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rcu = ((float) rcu_ref) * (num_sce + (0.5 * num_lfe) + (0.5 * num_cce_indep) +
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(0.4 * num_cce_dep));
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if (num_cpe < 2)
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rcu += (rcu_ref + (rcu_ref - 1)) * num_cpe;
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else
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rcu += (rcu_ref + (rcu_ref - 1) * ((2 * num_cpe) - 1));
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num_channels = num_sce + (2 * num_cpe) + num_lfe;
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if (profile == 2) {
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/* AAC LC => return the level as per the 'AAC Profile' */
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if (num_channels <= 2 && rate <= 24000 && pcu <= 3 && rcu <= 5)
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ret = 1;
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else if (num_channels <= 2 && rate <= 48000 && pcu <= 6 && rcu <= 5)
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ret = 2;
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/* There is no level 3 for the AAC Profile */
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else if (num_channels <= 5 && rate <= 48000 && pcu <= 19 && rcu <= 15)
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ret = 4;
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else if (num_channels <= 5 && rate <= 96000 && pcu <= 38 && rcu <= 15)
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ret = 5;
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else if (num_channels <= 7 && rate <= 48000 && pcu <= 25 && rcu <= 19)
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ret = 6;
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else if (num_channels <= 7 && rate <= 96000 && pcu <= 50 && rcu <= 19)
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ret = 7;
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} else {
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/* Return the level as per the 'Main Profile' */
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if (pcu < 40 && rcu < 20)
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ret = 1;
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else if (pcu < 80 && rcu < 64)
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ret = 2;
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else if (pcu < 160 && rcu < 128)
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ret = 3;
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else if (pcu < 320 && rcu < 256)
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ret = 4;
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}
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if (ret == -1) {
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GST_WARNING ("couldn't determine level: profile=%u, rate=%u, "
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"channel_config=%u, pcu=%d,rcu=%d", profile, rate, channel_config, pcu,
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rcu);
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return NULL;
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} else {
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return digit_to_string (ret);
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}
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}
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/**
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* gst_codec_utils_aac_caps_set_level_and_profile:
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* @caps: the #GstCaps to which level and profile fields are to be added
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* @audio_config: a pointer to the AudioSpecificConfig as specified in the
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* Elementary Stream Descriptor (esds) in ISO/IEC 14496-1 (see
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* below for a more details).
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* @len: Length of @audio_config in bytes
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*
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* Sets the level and profile on @caps if it can be determined from
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* @audio_config. See gst_codec_utils_aac_get_level() and
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* gst_codec_utils_aac_get_profile() for more details on the parameters.
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* @caps must be audio/mpeg caps with an "mpegversion" field of either 2 or 4.
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* If mpegversion is 4, the "base-profile" field is also set in @caps.
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*
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* Returns: %TRUE if the level and profile could be set, %FALSE otherwise.
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*/
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gboolean
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gst_codec_utils_aac_caps_set_level_and_profile (GstCaps * caps,
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const guint8 * audio_config, guint len)
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{
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GstStructure *s;
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const gchar *level, *profile;
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int mpegversion = 0;
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g_return_val_if_fail (GST_IS_CAPS (caps), FALSE);
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g_return_val_if_fail (GST_CAPS_IS_SIMPLE (caps), FALSE);
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g_return_val_if_fail (GST_SIMPLE_CAPS_HAS_NAME (caps, "audio/mpeg"), FALSE);
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g_return_val_if_fail (GST_SIMPLE_CAPS_HAS_FIELD (caps, "mpegversion"), FALSE);
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g_return_val_if_fail (audio_config != NULL, FALSE);
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s = gst_caps_get_structure (caps, 0);
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gst_structure_get_int (s, "mpegversion", &mpegversion);
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g_return_val_if_fail (mpegversion == 2 || mpegversion == 4, FALSE);
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level = gst_codec_utils_aac_get_level (audio_config, len);
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if (level != NULL)
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gst_structure_set (s, "level", G_TYPE_STRING, level, NULL);
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profile = gst_codec_utils_aac_get_profile (audio_config, len);
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if (profile != NULL) {
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if (mpegversion == 4) {
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gst_structure_set (s, "base-profile", G_TYPE_STRING, profile,
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"profile", G_TYPE_STRING, profile, NULL);
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} else {
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gst_structure_set (s, "profile", G_TYPE_STRING, profile, NULL);
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}
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}
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GST_LOG ("profile : %s", (profile) ? profile : "---");
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GST_LOG ("level : %s", (level) ? level : "---");
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return (level != NULL && profile != NULL);
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}
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/**
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* gst_codec_utils_h264_get_profile:
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* @sps: Pointer to the sequence parameter set for the stream.
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* @len: Length of the data available in @sps.
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*
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* Converts the profile indication (profile_idc) in the stream's
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* sequence parameter set into a string. The SPS is expected to have the
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* following format, as defined in the H.264 specification. The SPS is viewed
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* as a bitstream here, with bit 0 being the most significant bit of the first
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* byte.
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*
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* * Bit 0:7 - Profile indication
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* * Bit 8 - constraint_set0_flag
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* * Bit 9 - constraint_set1_flag
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* * Bit 10 - constraint_set2_flag
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* * Bit 11 - constraint_set3_flag
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* * Bit 12 - constraint_set3_flag
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* * Bit 13:15 - Reserved
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* * Bit 16:24 - Level indication
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*
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* Returns: The profile as a const string, or %NULL if there is an error.
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*/
|
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const gchar *
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gst_codec_utils_h264_get_profile (const guint8 * sps, guint len)
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{
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const gchar *profile = NULL;
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gint csf1, csf3, csf5;
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|
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g_return_val_if_fail (sps != NULL, NULL);
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|
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if (len < 2)
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return NULL;
|
|
|
|
GST_MEMDUMP ("SPS", sps, len);
|
|
|
|
csf1 = (sps[1] & 0x40) >> 6;
|
|
csf3 = (sps[1] & 0x10) >> 4;
|
|
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:
|
|
profile = "high";
|
|
break;
|
|
case 110:
|
|
if (csf3)
|
|
profile = "high-10-intra";
|
|
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: 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: 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";
|
|
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;
|
|
|
|
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: 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_h265_get_profile:
|
|
* @profile_tier_level: 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 - general_reserved_zero_44bits
|
|
* * Bit 88:95 - general_level_idc
|
|
*
|
|
* Returns: 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;
|
|
|
|
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";
|
|
else
|
|
profile = NULL;
|
|
|
|
return profile;
|
|
}
|
|
|
|
/**
|
|
* gst_codec_utils_h265_get_tier:
|
|
* @profile_tier_level: Pointer to the profile_tier_level structure
|
|
* 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: 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: Pointer to the profile_tier_level structure
|
|
* 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: 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: 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: 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: 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: 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: 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: 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 which the level and profile are to be added
|
|
* @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: 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)) {
|
|
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: (allow-none): the mapping between the streams
|
|
*
|
|
* Creates Opus caps from the given parameters.
|
|
*
|
|
* Returns: The #GstCaps.
|
|
*
|
|
* 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;
|
|
GValue va = G_VALUE_INIT;
|
|
GValue v = G_VALUE_INIT;
|
|
gint i;
|
|
|
|
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;
|
|
|
|
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);
|
|
}
|
|
|
|
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);
|
|
|
|
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);
|
|
|
|
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: (allow-none): Comment header or NULL
|
|
*
|
|
* Creates Opus caps from the given OpusHead @header and comment header
|
|
* @comments.
|
|
*
|
|
* Returns: 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;
|
|
|
|
caps =
|
|
gst_codec_utils_opus_create_caps (rate, channels, channel_mapping_family,
|
|
stream_count, coupled_count, channel_mapping);
|
|
|
|
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: (allow-none): 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: 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");
|
|
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: 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: the mapping between the streams
|
|
* @pre_skip: Pre-skip in 48kHz samples or 0
|
|
* @output_gain: 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;
|
|
}
|