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gstreamer/ext/libav/gstavviddec.c
Vivia Nikolaidou 83190c4ec0 gstavviddec: Only allow a single closed caption meta 
Following discussion in
https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1396#note_556068

While it is technically possible to store multiple closed caption metas
in the same buffer, we don't currently do that anywhere and for
H264/MPEG2 both parts have to be stored in the same packet, and also the
number of CC bytes you can store per frame is rather limited. This
restriction might be relaxed later once we figured out how to do it
without breaking things.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-libav/-/merge_requests/82>
2020-07-03 07:02:05 +00:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <assert.h>
#include <string.h>
#include <libavcodec/avcodec.h>
#include <libavutil/stereo3d.h>
#include <libavutil/mastering_display_metadata.h>
#include "gstav.h"
#include "gstavcodecmap.h"
#include "gstavutils.h"
#include "gstavviddec.h"
GST_DEBUG_CATEGORY_STATIC (GST_CAT_PERFORMANCE);
#define MAX_TS_MASK 0xff
#define DEFAULT_LOWRES 0
#define DEFAULT_SKIPFRAME 0
#define DEFAULT_DIRECT_RENDERING TRUE
#define DEFAULT_DEBUG_MV FALSE
#define DEFAULT_MAX_THREADS 0
#define DEFAULT_OUTPUT_CORRUPT TRUE
#define REQUIRED_POOL_MAX_BUFFERS 32
#define DEFAULT_STRIDE_ALIGN 31
#define DEFAULT_ALLOC_PARAM { 0, DEFAULT_STRIDE_ALIGN, 0, 0, }
#define DEFAULT_THREAD_TYPE 0
enum
{
PROP_0,
PROP_LOWRES,
PROP_SKIPFRAME,
PROP_DIRECT_RENDERING,
PROP_DEBUG_MV,
PROP_MAX_THREADS,
PROP_OUTPUT_CORRUPT,
PROP_THREAD_TYPE,
PROP_LAST
};
/* A number of function prototypes are given so we can refer to them later. */
static void gst_ffmpegviddec_base_init (GstFFMpegVidDecClass * klass);
static void gst_ffmpegviddec_class_init (GstFFMpegVidDecClass * klass);
static void gst_ffmpegviddec_init (GstFFMpegVidDec * ffmpegdec);
static void gst_ffmpegviddec_finalize (GObject * object);
static gboolean gst_ffmpegviddec_set_format (GstVideoDecoder * decoder,
GstVideoCodecState * state);
static GstFlowReturn gst_ffmpegviddec_handle_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame);
static gboolean gst_ffmpegviddec_start (GstVideoDecoder * decoder);
static gboolean gst_ffmpegviddec_stop (GstVideoDecoder * decoder);
static gboolean gst_ffmpegviddec_flush (GstVideoDecoder * decoder);
static gboolean gst_ffmpegviddec_decide_allocation (GstVideoDecoder * decoder,
GstQuery * query);
static gboolean gst_ffmpegviddec_propose_allocation (GstVideoDecoder * decoder,
GstQuery * query);
static void gst_ffmpegviddec_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_ffmpegviddec_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static gboolean gst_ffmpegviddec_negotiate (GstFFMpegVidDec * ffmpegdec,
AVCodecContext * context, AVFrame * picture);
/* some sort of bufferpool handling, but different */
static int gst_ffmpegviddec_get_buffer2 (AVCodecContext * context,
AVFrame * picture, int flags);
static GstFlowReturn gst_ffmpegviddec_finish (GstVideoDecoder * decoder);
static GstFlowReturn gst_ffmpegviddec_drain (GstVideoDecoder * decoder);
static gboolean picture_changed (GstFFMpegVidDec * ffmpegdec,
AVFrame * picture);
static gboolean context_changed (GstFFMpegVidDec * ffmpegdec,
AVCodecContext * context);
#define GST_FFDEC_PARAMS_QDATA g_quark_from_static_string("avdec-params")
static GstElementClass *parent_class = NULL;
#define GST_FFMPEGVIDDEC_TYPE_LOWRES (gst_ffmpegviddec_lowres_get_type())
static GType
gst_ffmpegviddec_lowres_get_type (void)
{
static GType ffmpegdec_lowres_type = 0;
if (!ffmpegdec_lowres_type) {
static const GEnumValue ffmpegdec_lowres[] = {
{0, "0", "full"},
{1, "1", "1/2-size"},
{2, "2", "1/4-size"},
{0, NULL, NULL},
};
ffmpegdec_lowres_type =
g_enum_register_static ("GstLibAVVidDecLowres", ffmpegdec_lowres);
}
return ffmpegdec_lowres_type;
}
#define GST_FFMPEGVIDDEC_TYPE_SKIPFRAME (gst_ffmpegviddec_skipframe_get_type())
static GType
gst_ffmpegviddec_skipframe_get_type (void)
{
static GType ffmpegdec_skipframe_type = 0;
if (!ffmpegdec_skipframe_type) {
static const GEnumValue ffmpegdec_skipframe[] = {
{0, "0", "Skip nothing"},
{1, "1", "Skip B-frames"},
{2, "2", "Skip IDCT/Dequantization"},
{5, "5", "Skip everything"},
{0, NULL, NULL},
};
ffmpegdec_skipframe_type =
g_enum_register_static ("GstLibAVVidDecSkipFrame", ffmpegdec_skipframe);
}
return ffmpegdec_skipframe_type;
}
static const GFlagsValue ffmpegdec_thread_types[] = {
{0x0, "Auto", "auto"},
{0x1, "Frame", "frame"},
{0x2, "Slice", "slice"},
{0, NULL, NULL},
};
#define GST_FFMPEGVIDDEC_TYPE_THREAD_TYPE (gst_ffmpegviddec_thread_type_get_type())
static GType
gst_ffmpegviddec_thread_type_get_type (void)
{
static GType ffmpegdec_thread_type_type = 0;
if (!ffmpegdec_thread_type_type) {
ffmpegdec_thread_type_type =
g_flags_register_static ("GstLibAVVidDecThreadType",
ffmpegdec_thread_types);
}
return ffmpegdec_thread_type_type;
}
static void
gst_ffmpegviddec_base_init (GstFFMpegVidDecClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstPadTemplate *sinktempl, *srctempl;
GstCaps *sinkcaps, *srccaps;
AVCodec *in_plugin;
gchar *longname, *description;
in_plugin =
(AVCodec *) g_type_get_qdata (G_OBJECT_CLASS_TYPE (klass),
GST_FFDEC_PARAMS_QDATA);
g_assert (in_plugin != NULL);
/* construct the element details struct */
longname = g_strdup_printf ("libav %s decoder", in_plugin->long_name);
description = g_strdup_printf ("libav %s decoder", in_plugin->name);
gst_element_class_set_metadata (element_class, longname,
"Codec/Decoder/Video", description,
"Wim Taymans <wim.taymans@gmail.com>, "
"Ronald Bultje <rbultje@ronald.bitfreak.net>, "
"Edward Hervey <bilboed@bilboed.com>");
g_free (longname);
g_free (description);
/* get the caps */
sinkcaps = gst_ffmpeg_codecid_to_caps (in_plugin->id, NULL, FALSE);
if (!sinkcaps) {
GST_DEBUG ("Couldn't get sink caps for decoder '%s'", in_plugin->name);
sinkcaps = gst_caps_new_empty_simple ("unknown/unknown");
}
srccaps = gst_ffmpeg_codectype_to_video_caps (NULL,
in_plugin->id, FALSE, in_plugin);
if (!srccaps) {
GST_DEBUG ("Couldn't get source caps for decoder '%s'", in_plugin->name);
srccaps = gst_caps_from_string ("video/x-raw");
}
/* pad templates */
sinktempl = gst_pad_template_new ("sink", GST_PAD_SINK,
GST_PAD_ALWAYS, sinkcaps);
srctempl = gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS, srccaps);
gst_element_class_add_pad_template (element_class, srctempl);
gst_element_class_add_pad_template (element_class, sinktempl);
gst_caps_unref (sinkcaps);
gst_caps_unref (srccaps);
klass->in_plugin = in_plugin;
}
static void
gst_ffmpegviddec_class_init (GstFFMpegVidDecClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstVideoDecoderClass *viddec_class = GST_VIDEO_DECODER_CLASS (klass);
int caps;
parent_class = g_type_class_peek_parent (klass);
gobject_class->finalize = gst_ffmpegviddec_finalize;
gobject_class->set_property = gst_ffmpegviddec_set_property;
gobject_class->get_property = gst_ffmpegviddec_get_property;
g_object_class_install_property (gobject_class, PROP_SKIPFRAME,
g_param_spec_enum ("skip-frame", "Skip frames",
"Which types of frames to skip during decoding",
GST_FFMPEGVIDDEC_TYPE_SKIPFRAME, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_LOWRES,
g_param_spec_enum ("lowres", "Low resolution",
"At which resolution to decode images",
GST_FFMPEGVIDDEC_TYPE_LOWRES, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DIRECT_RENDERING,
g_param_spec_boolean ("direct-rendering", "Direct Rendering",
"Enable direct rendering", DEFAULT_DIRECT_RENDERING,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DEBUG_MV,
g_param_spec_boolean ("debug-mv", "Debug motion vectors",
"Whether libav should print motion vectors on top of the image",
DEFAULT_DEBUG_MV, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_OUTPUT_CORRUPT,
g_param_spec_boolean ("output-corrupt", "Output corrupt buffers",
"Whether libav should output frames even if corrupted",
DEFAULT_OUTPUT_CORRUPT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
caps = klass->in_plugin->capabilities;
if (caps & (AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_SLICE_THREADS)) {
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MAX_THREADS,
g_param_spec_int ("max-threads", "Maximum decode threads",
"Maximum number of worker threads to spawn. (0 = auto)",
0, G_MAXINT, DEFAULT_MAX_THREADS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_THREAD_TYPE,
g_param_spec_flags ("thread-type", "Thread type",
"Multithreading methods to use",
GST_FFMPEGVIDDEC_TYPE_THREAD_TYPE,
DEFAULT_THREAD_TYPE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
viddec_class->set_format = gst_ffmpegviddec_set_format;
viddec_class->handle_frame = gst_ffmpegviddec_handle_frame;
viddec_class->start = gst_ffmpegviddec_start;
viddec_class->stop = gst_ffmpegviddec_stop;
viddec_class->flush = gst_ffmpegviddec_flush;
viddec_class->finish = gst_ffmpegviddec_finish;
viddec_class->drain = gst_ffmpegviddec_drain;
viddec_class->decide_allocation = gst_ffmpegviddec_decide_allocation;
viddec_class->propose_allocation = gst_ffmpegviddec_propose_allocation;
GST_DEBUG_CATEGORY_GET (GST_CAT_PERFORMANCE, "GST_PERFORMANCE");
gst_type_mark_as_plugin_api (GST_FFMPEGVIDDEC_TYPE_LOWRES, 0);
gst_type_mark_as_plugin_api (GST_FFMPEGVIDDEC_TYPE_SKIPFRAME, 0);
gst_type_mark_as_plugin_api (GST_FFMPEGVIDDEC_TYPE_THREAD_TYPE, 0);
}
static void
gst_ffmpegviddec_init (GstFFMpegVidDec * ffmpegdec)
{
GstFFMpegVidDecClass *klass =
(GstFFMpegVidDecClass *) G_OBJECT_GET_CLASS (ffmpegdec);
/* some ffmpeg data */
ffmpegdec->context = avcodec_alloc_context3 (klass->in_plugin);
ffmpegdec->context->opaque = ffmpegdec;
ffmpegdec->picture = av_frame_alloc ();
ffmpegdec->opened = FALSE;
ffmpegdec->skip_frame = ffmpegdec->lowres = 0;
ffmpegdec->direct_rendering = DEFAULT_DIRECT_RENDERING;
ffmpegdec->debug_mv = DEFAULT_DEBUG_MV;
ffmpegdec->max_threads = DEFAULT_MAX_THREADS;
ffmpegdec->output_corrupt = DEFAULT_OUTPUT_CORRUPT;
ffmpegdec->thread_type = DEFAULT_THREAD_TYPE;
GST_PAD_SET_ACCEPT_TEMPLATE (GST_VIDEO_DECODER_SINK_PAD (ffmpegdec));
gst_video_decoder_set_use_default_pad_acceptcaps (GST_VIDEO_DECODER_CAST
(ffmpegdec), TRUE);
gst_video_decoder_set_needs_format (GST_VIDEO_DECODER (ffmpegdec), TRUE);
}
static void
gst_ffmpegviddec_finalize (GObject * object)
{
GstFFMpegVidDec *ffmpegdec = (GstFFMpegVidDec *) object;
av_frame_free (&ffmpegdec->picture);
if (ffmpegdec->context != NULL) {
gst_ffmpeg_avcodec_close (ffmpegdec->context);
av_free (ffmpegdec->context);
ffmpegdec->context = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_ffmpegviddec_context_set_flags (AVCodecContext * context, guint flags,
gboolean enable)
{
g_return_if_fail (context != NULL);
if (enable)
context->flags |= flags;
else
context->flags &= ~flags;
}
/* with LOCK */
static gboolean
gst_ffmpegviddec_close (GstFFMpegVidDec * ffmpegdec, gboolean reset)
{
GstFFMpegVidDecClass *oclass;
guint i;
oclass = (GstFFMpegVidDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
GST_LOG_OBJECT (ffmpegdec, "closing ffmpeg codec");
gst_caps_replace (&ffmpegdec->last_caps, NULL);
gst_ffmpeg_avcodec_close (ffmpegdec->context);
ffmpegdec->opened = FALSE;
for (i = 0; i < G_N_ELEMENTS (ffmpegdec->stride); i++)
ffmpegdec->stride[i] = -1;
gst_buffer_replace (&ffmpegdec->palette, NULL);
if (ffmpegdec->context->extradata) {
av_free (ffmpegdec->context->extradata);
ffmpegdec->context->extradata = NULL;
}
if (reset) {
if (avcodec_get_context_defaults3 (ffmpegdec->context,
oclass->in_plugin) < 0) {
GST_DEBUG_OBJECT (ffmpegdec, "Failed to set context defaults");
return FALSE;
}
ffmpegdec->context->opaque = ffmpegdec;
}
return TRUE;
}
/* with LOCK */
static gboolean
gst_ffmpegviddec_open (GstFFMpegVidDec * ffmpegdec)
{
GstFFMpegVidDecClass *oclass;
guint i;
oclass = (GstFFMpegVidDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
if (gst_ffmpeg_avcodec_open (ffmpegdec->context, oclass->in_plugin) < 0)
goto could_not_open;
for (i = 0; i < G_N_ELEMENTS (ffmpegdec->stride); i++)
ffmpegdec->stride[i] = -1;
ffmpegdec->opened = TRUE;
GST_LOG_OBJECT (ffmpegdec, "Opened libav codec %s, id %d",
oclass->in_plugin->name, oclass->in_plugin->id);
gst_ffmpegviddec_context_set_flags (ffmpegdec->context,
AV_CODEC_FLAG_OUTPUT_CORRUPT, ffmpegdec->output_corrupt);
return TRUE;
/* ERRORS */
could_not_open:
{
gst_ffmpegviddec_close (ffmpegdec, TRUE);
GST_DEBUG_OBJECT (ffmpegdec, "avdec_%s: Failed to open libav codec",
oclass->in_plugin->name);
return FALSE;
}
}
static void
gst_ffmpegviddec_get_palette (GstFFMpegVidDec * ffmpegdec,
GstVideoCodecState * state)
{
GstStructure *str = gst_caps_get_structure (state->caps, 0);
const GValue *palette_v;
GstBuffer *palette;
/* do we have a palette? */
if ((palette_v = gst_structure_get_value (str, "palette_data"))) {
palette = gst_value_get_buffer (palette_v);
GST_DEBUG ("got palette data %p", palette);
if (gst_buffer_get_size (palette) >= AVPALETTE_SIZE) {
gst_buffer_replace (&ffmpegdec->palette, palette);
}
}
}
static gboolean
gst_ffmpegviddec_set_format (GstVideoDecoder * decoder,
GstVideoCodecState * state)
{
GstFFMpegVidDec *ffmpegdec;
GstFFMpegVidDecClass *oclass;
GstClockTime latency = GST_CLOCK_TIME_NONE;
gboolean ret = FALSE;
ffmpegdec = (GstFFMpegVidDec *) decoder;
oclass = (GstFFMpegVidDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
if (ffmpegdec->last_caps != NULL &&
gst_caps_is_equal (ffmpegdec->last_caps, state->caps)) {
return TRUE;
}
GST_DEBUG_OBJECT (ffmpegdec, "setcaps called");
GST_OBJECT_LOCK (ffmpegdec);
/* stupid check for VC1 */
if ((oclass->in_plugin->id == AV_CODEC_ID_WMV3) ||
(oclass->in_plugin->id == AV_CODEC_ID_VC1))
oclass->in_plugin->id = gst_ffmpeg_caps_to_codecid (state->caps, NULL);
/* close old session */
if (ffmpegdec->opened) {
GST_OBJECT_UNLOCK (ffmpegdec);
gst_ffmpegviddec_finish (decoder);
GST_OBJECT_LOCK (ffmpegdec);
if (!gst_ffmpegviddec_close (ffmpegdec, TRUE)) {
GST_OBJECT_UNLOCK (ffmpegdec);
return FALSE;
}
ffmpegdec->pic_pix_fmt = 0;
ffmpegdec->pic_width = 0;
ffmpegdec->pic_height = 0;
ffmpegdec->pic_par_n = 0;
ffmpegdec->pic_par_d = 0;
ffmpegdec->pic_interlaced = 0;
ffmpegdec->pic_field_order = 0;
ffmpegdec->pic_field_order_changed = FALSE;
ffmpegdec->ctx_ticks = 0;
ffmpegdec->ctx_time_n = 0;
ffmpegdec->ctx_time_d = 0;
ffmpegdec->cur_multiview_mode = GST_VIDEO_MULTIVIEW_MODE_NONE;
ffmpegdec->cur_multiview_flags = GST_VIDEO_MULTIVIEW_FLAGS_NONE;
}
gst_caps_replace (&ffmpegdec->last_caps, state->caps);
/* set buffer functions */
ffmpegdec->context->get_buffer2 = gst_ffmpegviddec_get_buffer2;
ffmpegdec->context->draw_horiz_band = NULL;
/* reset coded_width/_height to prevent it being reused from last time when
* the codec is opened again, causing a mismatch and possible
* segfault/corruption. (Common scenario when renegotiating caps) */
ffmpegdec->context->coded_width = 0;
ffmpegdec->context->coded_height = 0;
GST_LOG_OBJECT (ffmpegdec, "size %dx%d", ffmpegdec->context->width,
ffmpegdec->context->height);
/* FIXME : Create a method that takes GstVideoCodecState instead */
/* get size and so */
gst_ffmpeg_caps_with_codecid (oclass->in_plugin->id,
oclass->in_plugin->type, state->caps, ffmpegdec->context);
GST_LOG_OBJECT (ffmpegdec, "size after %dx%d", ffmpegdec->context->width,
ffmpegdec->context->height);
gst_ffmpegviddec_get_palette (ffmpegdec, state);
if (!ffmpegdec->context->time_base.den || !ffmpegdec->context->time_base.num) {
GST_DEBUG_OBJECT (ffmpegdec, "forcing 25/1 framerate");
ffmpegdec->context->time_base.num = 1;
ffmpegdec->context->time_base.den = 25;
}
/* workaround encoder bugs */
ffmpegdec->context->workaround_bugs |= FF_BUG_AUTODETECT;
ffmpegdec->context->err_recognition = 1;
/* for slow cpus */
ffmpegdec->context->lowres = ffmpegdec->lowres;
ffmpegdec->context->skip_frame = ffmpegdec->skip_frame;
/* ffmpeg can draw motion vectors on top of the image (not every decoder
* supports it) */
ffmpegdec->context->debug_mv = ffmpegdec->debug_mv;
if (ffmpegdec->thread_type) {
GST_DEBUG_OBJECT (ffmpegdec, "Use requested thread type 0x%x",
ffmpegdec->thread_type);
ffmpegdec->context->thread_type = ffmpegdec->thread_type;
} else {
GstQuery *query;
gboolean is_live;
query = gst_query_new_latency ();
is_live = FALSE;
/* Check if upstream is live. If it isn't we can enable frame based
* threading, which is adding latency */
if (gst_pad_peer_query (GST_VIDEO_DECODER_SINK_PAD (ffmpegdec), query)) {
gst_query_parse_latency (query, &is_live, NULL, NULL);
}
gst_query_unref (query);
if (is_live)
ffmpegdec->context->thread_type = FF_THREAD_SLICE;
else
ffmpegdec->context->thread_type = FF_THREAD_SLICE | FF_THREAD_FRAME;
}
if (ffmpegdec->max_threads == 0) {
/* When thread type is FF_THREAD_FRAME, extra latency is introduced equal
* to one frame per thread. We thus need to calculate the thread count ourselves */
if ((!(oclass->in_plugin->capabilities & AV_CODEC_CAP_AUTO_THREADS)) ||
(ffmpegdec->context->thread_type & FF_THREAD_FRAME))
ffmpegdec->context->thread_count =
MIN (gst_ffmpeg_auto_max_threads (), 16);
else
ffmpegdec->context->thread_count = 0;
} else
ffmpegdec->context->thread_count = ffmpegdec->max_threads;
/* open codec - we don't select an output pix_fmt yet,
* simply because we don't know! We only get it
* during playback... */
if (!gst_ffmpegviddec_open (ffmpegdec))
goto open_failed;
if (ffmpegdec->input_state)
gst_video_codec_state_unref (ffmpegdec->input_state);
ffmpegdec->input_state = gst_video_codec_state_ref (state);
if (ffmpegdec->input_state->info.fps_n) {
GstVideoInfo *info = &ffmpegdec->input_state->info;
latency = gst_util_uint64_scale_ceil (
(ffmpegdec->context->has_b_frames) * GST_SECOND, info->fps_d,
info->fps_n);
if (ffmpegdec->context->thread_type & FF_THREAD_FRAME) {
latency +=
gst_util_uint64_scale_ceil (ffmpegdec->context->thread_count *
GST_SECOND, info->fps_d, info->fps_n);
}
}
ret = TRUE;
done:
GST_OBJECT_UNLOCK (ffmpegdec);
if (GST_CLOCK_TIME_IS_VALID (latency))
gst_video_decoder_set_latency (decoder, latency, latency);
return ret;
/* ERRORS */
open_failed:
{
GST_DEBUG_OBJECT (ffmpegdec, "Failed to open");
goto done;
}
}
typedef struct
{
GstFFMpegVidDec *ffmpegdec;
GstVideoCodecFrame *frame;
gboolean mapped;
GstVideoFrame vframe;
GstBuffer *buffer;
AVBufferRef *avbuffer;
} GstFFMpegVidDecVideoFrame;
static GstFFMpegVidDecVideoFrame *
gst_ffmpegviddec_video_frame_new (GstFFMpegVidDec * ffmpegdec,
GstVideoCodecFrame * frame)
{
GstFFMpegVidDecVideoFrame *dframe;
dframe = g_slice_new0 (GstFFMpegVidDecVideoFrame);
dframe->ffmpegdec = ffmpegdec;
dframe->frame = frame;
GST_DEBUG_OBJECT (ffmpegdec, "new video frame %p", dframe);
return dframe;
}
static void
gst_ffmpegviddec_video_frame_free (GstFFMpegVidDec * ffmpegdec,
GstFFMpegVidDecVideoFrame * frame)
{
GST_DEBUG_OBJECT (ffmpegdec, "free video frame %p", frame);
if (frame->mapped)
gst_video_frame_unmap (&frame->vframe);
gst_video_decoder_release_frame (GST_VIDEO_DECODER (ffmpegdec), frame->frame);
gst_buffer_replace (&frame->buffer, NULL);
if (frame->avbuffer) {
av_buffer_unref (&frame->avbuffer);
}
g_slice_free (GstFFMpegVidDecVideoFrame, frame);
}
static void
dummy_free_buffer (void *opaque, uint8_t * data)
{
GstFFMpegVidDecVideoFrame *frame = opaque;
gst_ffmpegviddec_video_frame_free (frame->ffmpegdec, frame);
}
/* This function prepares the pool configuration for direct rendering. To use
* this method, the codec should support direct rendering and the pool should
* support video meta and video alignment */
static void
gst_ffmpegvideodec_prepare_dr_pool (GstFFMpegVidDec * ffmpegdec,
GstBufferPool * pool, GstVideoInfo * info, GstStructure * config)
{
GstAllocationParams params;
GstVideoAlignment align;
GstAllocator *allocator = NULL;
gint width, height;
gint linesize_align[4];
gint i;
gsize max_align;
width = GST_VIDEO_INFO_WIDTH (info);
height = GST_VIDEO_INFO_HEIGHT (info);
/* let ffmpeg find the alignment and padding */
avcodec_align_dimensions2 (ffmpegdec->context, &width, &height,
linesize_align);
align.padding_top = 0;
align.padding_left = 0;
align.padding_right = width - GST_VIDEO_INFO_WIDTH (info);
align.padding_bottom = height - GST_VIDEO_INFO_HEIGHT (info);
/* add extra padding to match libav buffer allocation sizes */
align.padding_bottom++;
gst_buffer_pool_config_get_allocator (config, &allocator, &params);
max_align = DEFAULT_STRIDE_ALIGN;
max_align |= params.align;
for (i = 0; i < GST_VIDEO_MAX_PLANES; i++) {
if (linesize_align[i] > 0)
max_align |= linesize_align[i] - 1;
}
for (i = 0; i < GST_VIDEO_MAX_PLANES; i++)
align.stride_align[i] = max_align;
params.align = max_align;
gst_buffer_pool_config_set_allocator (config, allocator, &params);
GST_DEBUG_OBJECT (ffmpegdec, "aligned dimension %dx%d -> %dx%d "
"padding t:%u l:%u r:%u b:%u, stride_align %d:%d:%d:%d",
GST_VIDEO_INFO_WIDTH (info),
GST_VIDEO_INFO_HEIGHT (info), width, height, align.padding_top,
align.padding_left, align.padding_right, align.padding_bottom,
align.stride_align[0], align.stride_align[1], align.stride_align[2],
align.stride_align[3]);
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT);
gst_buffer_pool_config_set_video_alignment (config, &align);
}
static void
gst_ffmpegviddec_ensure_internal_pool (GstFFMpegVidDec * ffmpegdec,
AVFrame * picture)
{
GstAllocationParams params = DEFAULT_ALLOC_PARAM;
GstVideoInfo info;
GstVideoFormat format;
GstCaps *caps;
GstStructure *config;
guint i;
if (ffmpegdec->internal_pool != NULL &&
ffmpegdec->pool_width == picture->width &&
ffmpegdec->pool_height == picture->height &&
ffmpegdec->pool_format == picture->format)
return;
GST_DEBUG_OBJECT (ffmpegdec, "Updating internal pool (%i, %i)",
picture->width, picture->height);
format = gst_ffmpeg_pixfmt_to_videoformat (picture->format);
gst_video_info_set_format (&info, format, picture->width, picture->height);
/* If we have not yet been negotiated, a NONE format here would
* result in invalid initial dimension alignments, and potential
* out of bounds writes.
*/
ffmpegdec->context->pix_fmt = picture->format;
for (i = 0; i < G_N_ELEMENTS (ffmpegdec->stride); i++)
ffmpegdec->stride[i] = -1;
if (ffmpegdec->internal_pool)
gst_object_unref (ffmpegdec->internal_pool);
ffmpegdec->internal_pool = gst_video_buffer_pool_new ();
config = gst_buffer_pool_get_config (ffmpegdec->internal_pool);
caps = gst_video_info_to_caps (&info);
gst_buffer_pool_config_set_params (config, caps, info.size, 2, 0);
gst_buffer_pool_config_set_allocator (config, NULL, &params);
gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
gst_ffmpegvideodec_prepare_dr_pool (ffmpegdec,
ffmpegdec->internal_pool, &info, config);
/* generic video pool never fails */
gst_buffer_pool_set_config (ffmpegdec->internal_pool, config);
gst_caps_unref (caps);
gst_buffer_pool_set_active (ffmpegdec->internal_pool, TRUE);
/* Remember pool size so we can detect changes */
ffmpegdec->pool_width = picture->width;
ffmpegdec->pool_height = picture->height;
ffmpegdec->pool_format = picture->format;
ffmpegdec->pool_info = info;
}
static gboolean
gst_ffmpegviddec_can_direct_render (GstFFMpegVidDec * ffmpegdec)
{
GstFFMpegVidDecClass *oclass;
if (!ffmpegdec->direct_rendering)
return FALSE;
oclass = (GstFFMpegVidDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
return ((oclass->in_plugin->capabilities & AV_CODEC_CAP_DR1) ==
AV_CODEC_CAP_DR1);
}
/* called when ffmpeg wants us to allocate a buffer to write the decoded frame
* into. We try to give it memory from our pool */
static int
gst_ffmpegviddec_get_buffer2 (AVCodecContext * context, AVFrame * picture,
int flags)
{
GstVideoCodecFrame *frame;
GstFFMpegVidDecVideoFrame *dframe;
GstFFMpegVidDec *ffmpegdec;
guint c;
GstFlowReturn ret;
int create_buffer_flags = 0;
ffmpegdec = (GstFFMpegVidDec *) context->opaque;
GST_DEBUG_OBJECT (ffmpegdec, "getting buffer picture %p", picture);
/* apply the last info we have seen to this picture, when we get the
* picture back from ffmpeg we can use this to correctly timestamp the output
* buffer */
GST_DEBUG_OBJECT (ffmpegdec, "opaque value SN %d",
(gint32) picture->reordered_opaque);
frame =
gst_video_decoder_get_frame (GST_VIDEO_DECODER (ffmpegdec),
picture->reordered_opaque);
if (G_UNLIKELY (frame == NULL))
goto no_frame;
/* now it has a buffer allocated, so it is real and will also
* be _released */
GST_VIDEO_CODEC_FRAME_FLAG_UNSET (frame,
GST_VIDEO_CODEC_FRAME_FLAG_DECODE_ONLY);
if (G_UNLIKELY (frame->output_buffer != NULL))
goto duplicate_frame;
/* GstFFMpegVidDecVideoFrame receives the frame ref */
if (picture->opaque) {
dframe = picture->opaque;
dframe->frame = frame;
} else {
picture->opaque = dframe =
gst_ffmpegviddec_video_frame_new (ffmpegdec, frame);
}
GST_DEBUG_OBJECT (ffmpegdec, "storing opaque %p", dframe);
if (!gst_ffmpegviddec_can_direct_render (ffmpegdec))
goto no_dr;
gst_ffmpegviddec_ensure_internal_pool (ffmpegdec, picture);
ret = gst_buffer_pool_acquire_buffer (ffmpegdec->internal_pool,
&frame->output_buffer, NULL);
if (ret != GST_FLOW_OK)
goto alloc_failed;
/* piggy-backed alloc'ed on the frame,
* and there was much rejoicing and we are grateful.
* Now take away buffer from frame, we will give it back later when decoded.
* This allows multiple request for a buffer per frame; unusual but possible. */
gst_buffer_replace (&dframe->buffer, frame->output_buffer);
gst_buffer_replace (&frame->output_buffer, NULL);
/* Fill avpicture */
if (!gst_video_frame_map (&dframe->vframe, &ffmpegdec->pool_info,
dframe->buffer, GST_MAP_READWRITE))
goto map_failed;
dframe->mapped = TRUE;
for (c = 0; c < AV_NUM_DATA_POINTERS; c++) {
if (c < GST_VIDEO_INFO_N_PLANES (&ffmpegdec->pool_info)) {
picture->data[c] = GST_VIDEO_FRAME_PLANE_DATA (&dframe->vframe, c);
picture->linesize[c] = GST_VIDEO_FRAME_PLANE_STRIDE (&dframe->vframe, c);
if (ffmpegdec->stride[c] == -1)
ffmpegdec->stride[c] = picture->linesize[c];
/* libav does not allow stride changes, decide allocation should check
* before replacing the internal pool with a downstream pool.
* https://bugzilla.gnome.org/show_bug.cgi?id=704769
* https://bugzilla.libav.org/show_bug.cgi?id=556
*/
g_assert (picture->linesize[c] == ffmpegdec->stride[c]);
} else {
picture->data[c] = NULL;
picture->linesize[c] = 0;
}
GST_LOG_OBJECT (ffmpegdec, "linesize %d, data %p", picture->linesize[c],
picture->data[c]);
}
if ((flags & AV_GET_BUFFER_FLAG_REF) == AV_GET_BUFFER_FLAG_REF) {
/* decoder might reuse this AVFrame and it would result to no more
* get_buffer() call if the AVFrame's AVBuffer is writable
* (meaning that the refcount of AVBuffer == 1).
* To enforce get_buffer() for the every output frame, set read-only flag here
*/
create_buffer_flags = AV_BUFFER_FLAG_READONLY;
}
picture->buf[0] = av_buffer_create (NULL,
0, dummy_free_buffer, dframe, create_buffer_flags);
GST_LOG_OBJECT (ffmpegdec, "returned frame %p", dframe->buffer);
return 0;
no_dr:
{
int c;
int ret = avcodec_default_get_buffer2 (context, picture, flags);
GST_LOG_OBJECT (ffmpegdec, "direct rendering disabled, fallback alloc");
for (c = 0; c < AV_NUM_DATA_POINTERS; c++) {
ffmpegdec->stride[c] = picture->linesize[c];
}
/* Wrap our buffer around the default one to be able to have a callback
* when our data can be freed. Just putting our data into the first free
* buffer might not work if there are too many allocated already
*/
if (picture->buf[0]) {
dframe->avbuffer = picture->buf[0];
picture->buf[0] =
av_buffer_create (picture->buf[0]->data, picture->buf[0]->size,
dummy_free_buffer, dframe, 0);
} else {
picture->buf[0] =
av_buffer_create (NULL, 0, dummy_free_buffer, dframe, 0);
}
return ret;
}
alloc_failed:
{
GST_ELEMENT_ERROR (ffmpegdec, RESOURCE, FAILED,
("Unable to allocate memory"),
("The downstream pool failed to allocated buffer."));
return -1;
}
map_failed:
{
GST_ELEMENT_ERROR (ffmpegdec, RESOURCE, OPEN_READ_WRITE,
("Cannot access memory for read and write operation."),
("The video memory allocated from downstream pool could not mapped for"
"read and write."));
return -1;
}
duplicate_frame:
{
GST_WARNING_OBJECT (ffmpegdec, "already alloc'ed output buffer for frame");
gst_video_codec_frame_unref (frame);
return -1;
}
no_frame:
{
GST_WARNING_OBJECT (ffmpegdec, "Couldn't get codec frame !");
return -1;
}
}
static gboolean
picture_changed (GstFFMpegVidDec * ffmpegdec, AVFrame * picture)
{
gint pic_field_order = 0;
if (picture->interlaced_frame) {
if (picture->repeat_pict)
pic_field_order |= GST_VIDEO_BUFFER_FLAG_RFF;
if (picture->top_field_first)
pic_field_order |= GST_VIDEO_BUFFER_FLAG_TFF;
}
return !(ffmpegdec->pic_width == picture->width
&& ffmpegdec->pic_height == picture->height
&& ffmpegdec->pic_pix_fmt == picture->format
&& ffmpegdec->pic_par_n == picture->sample_aspect_ratio.num
&& ffmpegdec->pic_par_d == picture->sample_aspect_ratio.den
&& ffmpegdec->pic_interlaced == picture->interlaced_frame
&& ffmpegdec->pic_field_order == pic_field_order
&& ffmpegdec->cur_multiview_mode == ffmpegdec->picture_multiview_mode
&& ffmpegdec->cur_multiview_flags == ffmpegdec->picture_multiview_flags);
}
static gboolean
context_changed (GstFFMpegVidDec * ffmpegdec, AVCodecContext * context)
{
return !(ffmpegdec->ctx_ticks == context->ticks_per_frame
&& ffmpegdec->ctx_time_n == context->time_base.num
&& ffmpegdec->ctx_time_d == context->time_base.den);
}
static gboolean
update_video_context (GstFFMpegVidDec * ffmpegdec, AVCodecContext * context,
AVFrame * picture)
{
gint pic_field_order = 0;
if (picture->interlaced_frame) {
if (picture->repeat_pict)
pic_field_order |= GST_VIDEO_BUFFER_FLAG_RFF;
if (picture->top_field_first)
pic_field_order |= GST_VIDEO_BUFFER_FLAG_TFF;
}
if (!picture_changed (ffmpegdec, picture)
&& !context_changed (ffmpegdec, context))
return FALSE;
GST_DEBUG_OBJECT (ffmpegdec,
"Renegotiating video from %dx%d@ %d:%d PAR %d/%d fps pixfmt %d to %dx%d@ %d:%d PAR %d/%d fps pixfmt %d",
ffmpegdec->pic_width, ffmpegdec->pic_height,
ffmpegdec->pic_par_n, ffmpegdec->pic_par_d,
ffmpegdec->ctx_time_n, ffmpegdec->ctx_time_d,
ffmpegdec->pic_pix_fmt,
picture->width, picture->height,
picture->sample_aspect_ratio.num,
picture->sample_aspect_ratio.den,
context->time_base.num, context->time_base.den, picture->format);
ffmpegdec->pic_pix_fmt = picture->format;
ffmpegdec->pic_width = picture->width;
ffmpegdec->pic_height = picture->height;
ffmpegdec->pic_par_n = picture->sample_aspect_ratio.num;
ffmpegdec->pic_par_d = picture->sample_aspect_ratio.den;
ffmpegdec->cur_multiview_mode = ffmpegdec->picture_multiview_mode;
ffmpegdec->cur_multiview_flags = ffmpegdec->picture_multiview_flags;
/* Remember if we have interlaced content and the field order changed
* at least once. If that happens, we must be interlace-mode=mixed
*/
if (ffmpegdec->pic_field_order_changed ||
(ffmpegdec->pic_field_order != pic_field_order &&
ffmpegdec->pic_interlaced))
ffmpegdec->pic_field_order_changed = TRUE;
ffmpegdec->pic_field_order = pic_field_order;
ffmpegdec->pic_interlaced = picture->interlaced_frame;
if (!ffmpegdec->pic_interlaced)
ffmpegdec->pic_field_order_changed = FALSE;
ffmpegdec->ctx_ticks = context->ticks_per_frame;
ffmpegdec->ctx_time_n = context->time_base.num;
ffmpegdec->ctx_time_d = context->time_base.den;
return TRUE;
}
static void
gst_ffmpegviddec_update_par (GstFFMpegVidDec * ffmpegdec,
GstVideoInfo * in_info, GstVideoInfo * out_info)
{
gboolean demuxer_par_set = FALSE;
gboolean decoder_par_set = FALSE;
gint demuxer_num = 1, demuxer_denom = 1;
gint decoder_num = 1, decoder_denom = 1;
if (in_info->par_n && in_info->par_d) {
demuxer_num = in_info->par_n;
demuxer_denom = in_info->par_d;
demuxer_par_set = TRUE;
GST_DEBUG_OBJECT (ffmpegdec, "Demuxer PAR: %d:%d", demuxer_num,
demuxer_denom);
}
if (ffmpegdec->pic_par_n && ffmpegdec->pic_par_d) {
decoder_num = ffmpegdec->pic_par_n;
decoder_denom = ffmpegdec->pic_par_d;
decoder_par_set = TRUE;
GST_DEBUG_OBJECT (ffmpegdec, "Decoder PAR: %d:%d", decoder_num,
decoder_denom);
}
if (!demuxer_par_set && !decoder_par_set)
goto no_par;
if (demuxer_par_set && !decoder_par_set)
goto use_demuxer_par;
if (decoder_par_set && !demuxer_par_set)
goto use_decoder_par;
/* Both the demuxer and the decoder provide a PAR. If one of
* the two PARs is 1:1 and the other one is not, use the one
* that is not 1:1. */
if (demuxer_num == demuxer_denom && decoder_num != decoder_denom)
goto use_decoder_par;
if (decoder_num == decoder_denom && demuxer_num != demuxer_denom)
goto use_demuxer_par;
/* Both PARs are non-1:1, so use the PAR provided by the demuxer */
goto use_demuxer_par;
use_decoder_par:
{
GST_DEBUG_OBJECT (ffmpegdec,
"Setting decoder provided pixel-aspect-ratio of %u:%u", decoder_num,
decoder_denom);
out_info->par_n = decoder_num;
out_info->par_d = decoder_denom;
return;
}
use_demuxer_par:
{
GST_DEBUG_OBJECT (ffmpegdec,
"Setting demuxer provided pixel-aspect-ratio of %u:%u", demuxer_num,
demuxer_denom);
out_info->par_n = demuxer_num;
out_info->par_d = demuxer_denom;
return;
}
no_par:
{
GST_DEBUG_OBJECT (ffmpegdec,
"Neither demuxer nor codec provide a pixel-aspect-ratio");
out_info->par_n = 1;
out_info->par_d = 1;
return;
}
}
static GstVideoMultiviewMode
stereo_av_to_gst (enum AVStereo3DType type)
{
switch (type) {
case AV_STEREO3D_SIDEBYSIDE:
return GST_VIDEO_MULTIVIEW_MODE_SIDE_BY_SIDE;
case AV_STEREO3D_TOPBOTTOM:
return GST_VIDEO_MULTIVIEW_MODE_TOP_BOTTOM;
case AV_STEREO3D_FRAMESEQUENCE:
return GST_VIDEO_MULTIVIEW_MODE_FRAME_BY_FRAME;
case AV_STEREO3D_CHECKERBOARD:
return GST_VIDEO_MULTIVIEW_MODE_CHECKERBOARD;
case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
return GST_VIDEO_MULTIVIEW_MODE_SIDE_BY_SIDE_QUINCUNX;
case AV_STEREO3D_LINES:
return GST_VIDEO_MULTIVIEW_MODE_ROW_INTERLEAVED;
case AV_STEREO3D_COLUMNS:
return GST_VIDEO_MULTIVIEW_MODE_COLUMN_INTERLEAVED;
default:
break;
}
return GST_VIDEO_MULTIVIEW_MODE_NONE;
}
static gboolean
mastering_display_metadata_av_to_gst (AVMasteringDisplayMetadata * av,
GstVideoMasteringDisplayInfo * gst)
{
const guint64 chroma_scale = 50000;
const guint64 luma_scale = 10000;
gint i;
/* Use only complete mastering meta */
if (!av->has_primaries || !av->has_luminance)
return FALSE;
for (i = 0; i < G_N_ELEMENTS (gst->display_primaries); i++) {
gst->display_primaries[i].x = (guint16) gst_util_uint64_scale (chroma_scale,
av->display_primaries[i][0].num, av->display_primaries[i][0].den);
gst->display_primaries[i].y = (guint16) gst_util_uint64_scale (chroma_scale,
av->display_primaries[i][1].num, av->display_primaries[i][1].den);
}
gst->white_point.x = (guint16) gst_util_uint64_scale (chroma_scale,
av->white_point[0].num, av->white_point[0].den);
gst->white_point.y = (guint16) gst_util_uint64_scale (chroma_scale,
av->white_point[1].num, av->white_point[1].den);
gst->max_display_mastering_luminance =
(guint32) gst_util_uint64_scale (luma_scale,
av->max_luminance.num, av->max_luminance.den);
gst->min_display_mastering_luminance =
(guint32) gst_util_uint64_scale (luma_scale,
av->min_luminance.num, av->min_luminance.den);
return TRUE;
}
static gboolean
content_light_metadata_av_to_gst (AVContentLightMetadata * av,
GstVideoContentLightLevel * gst)
{
gst->max_content_light_level = av->MaxCLL;
gst->max_frame_average_light_level = av->MaxFALL;
return TRUE;
}
static gboolean
gst_ffmpegviddec_negotiate (GstFFMpegVidDec * ffmpegdec,
AVCodecContext * context, AVFrame * picture)
{
GstVideoFormat fmt;
GstVideoInfo *in_info, *out_info;
GstVideoCodecState *output_state;
gint fps_n, fps_d;
GstClockTime latency;
GstStructure *in_s;
if (!update_video_context (ffmpegdec, context, picture))
return TRUE;
fmt = gst_ffmpeg_pixfmt_to_videoformat (ffmpegdec->pic_pix_fmt);
if (G_UNLIKELY (fmt == GST_VIDEO_FORMAT_UNKNOWN))
goto unknown_format;
output_state =
gst_video_decoder_set_output_state (GST_VIDEO_DECODER (ffmpegdec), fmt,
ffmpegdec->pic_width, ffmpegdec->pic_height, ffmpegdec->input_state);
if (ffmpegdec->output_state)
gst_video_codec_state_unref (ffmpegdec->output_state);
ffmpegdec->output_state = output_state;
in_info = &ffmpegdec->input_state->info;
out_info = &ffmpegdec->output_state->info;
/* set the interlaced flag */
in_s = gst_caps_get_structure (ffmpegdec->input_state->caps, 0);
if (!gst_structure_has_field (in_s, "interlace-mode")) {
if (ffmpegdec->pic_interlaced) {
if (ffmpegdec->pic_field_order_changed ||
(ffmpegdec->pic_field_order & GST_VIDEO_BUFFER_FLAG_RFF)) {
out_info->interlace_mode = GST_VIDEO_INTERLACE_MODE_MIXED;
} else {
out_info->interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
if ((ffmpegdec->pic_field_order & GST_VIDEO_BUFFER_FLAG_TFF))
GST_VIDEO_INFO_FIELD_ORDER (out_info) =
GST_VIDEO_FIELD_ORDER_TOP_FIELD_FIRST;
else
GST_VIDEO_INFO_FIELD_ORDER (out_info) =
GST_VIDEO_FIELD_ORDER_BOTTOM_FIELD_FIRST;
}
} else {
out_info->interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
}
}
if (!gst_structure_has_field (in_s, "chroma-site")) {
switch (context->chroma_sample_location) {
case AVCHROMA_LOC_LEFT:
out_info->chroma_site = GST_VIDEO_CHROMA_SITE_MPEG2;
break;
case AVCHROMA_LOC_CENTER:
out_info->chroma_site = GST_VIDEO_CHROMA_SITE_JPEG;
break;
case AVCHROMA_LOC_TOPLEFT:
out_info->chroma_site = GST_VIDEO_CHROMA_SITE_DV;
break;
case AVCHROMA_LOC_TOP:
out_info->chroma_site = GST_VIDEO_CHROMA_SITE_V_COSITED;
break;
default:
break;
}
}
if (!gst_structure_has_field (in_s, "colorimetry")
|| in_info->colorimetry.primaries == GST_VIDEO_COLOR_PRIMARIES_UNKNOWN) {
out_info->colorimetry.primaries =
gst_video_color_primaries_from_iso (context->color_primaries);
}
if (!gst_structure_has_field (in_s, "colorimetry")
|| in_info->colorimetry.transfer == GST_VIDEO_TRANSFER_UNKNOWN) {
out_info->colorimetry.transfer =
gst_video_color_transfer_from_iso (context->color_trc);
}
if (!gst_structure_has_field (in_s, "colorimetry")
|| in_info->colorimetry.matrix == GST_VIDEO_COLOR_MATRIX_UNKNOWN) {
out_info->colorimetry.matrix =
gst_video_color_matrix_from_iso (context->colorspace);
}
if (!gst_structure_has_field (in_s, "colorimetry")
|| in_info->colorimetry.range == GST_VIDEO_COLOR_RANGE_UNKNOWN) {
if (context->color_range == AVCOL_RANGE_JPEG) {
out_info->colorimetry.range = GST_VIDEO_COLOR_RANGE_0_255;
} else if (context->color_range == AVCOL_RANGE_MPEG) {
out_info->colorimetry.range = GST_VIDEO_COLOR_RANGE_16_235;
} else {
out_info->colorimetry.range = GST_VIDEO_COLOR_RANGE_UNKNOWN;
}
}
/* try to find a good framerate */
if ((in_info->fps_d && in_info->fps_n) ||
GST_VIDEO_INFO_FLAG_IS_SET (in_info, GST_VIDEO_FLAG_VARIABLE_FPS)) {
/* take framerate from input when it was specified (#313970) */
fps_n = in_info->fps_n;
fps_d = in_info->fps_d;
} else {
fps_n = ffmpegdec->ctx_time_d / ffmpegdec->ctx_ticks;
fps_d = ffmpegdec->ctx_time_n;
if (!fps_d) {
GST_LOG_OBJECT (ffmpegdec, "invalid framerate: %d/0, -> %d/1", fps_n,
fps_n);
fps_d = 1;
}
if (gst_util_fraction_compare (fps_n, fps_d, 1000, 1) > 0) {
GST_LOG_OBJECT (ffmpegdec, "excessive framerate: %d/%d, -> 0/1", fps_n,
fps_d);
fps_n = 0;
fps_d = 1;
}
}
GST_LOG_OBJECT (ffmpegdec, "setting framerate: %d/%d", fps_n, fps_d);
out_info->fps_n = fps_n;
out_info->fps_d = fps_d;
/* calculate and update par now */
gst_ffmpegviddec_update_par (ffmpegdec, in_info, out_info);
GST_VIDEO_INFO_MULTIVIEW_MODE (out_info) = ffmpegdec->cur_multiview_mode;
GST_VIDEO_INFO_MULTIVIEW_FLAGS (out_info) = ffmpegdec->cur_multiview_flags;
/* To passing HDR information to caps directly */
if (output_state->caps == NULL) {
output_state->caps = gst_video_info_to_caps (out_info);
} else {
output_state->caps = gst_caps_make_writable (output_state->caps);
}
if (!gst_structure_has_field (in_s, "mastering-display-info")) {
AVFrameSideData *sd = av_frame_get_side_data (picture,
AV_FRAME_DATA_MASTERING_DISPLAY_METADATA);
GstVideoMasteringDisplayInfo minfo;
if (sd
&& mastering_display_metadata_av_to_gst ((AVMasteringDisplayMetadata *)
sd->data, &minfo)) {
GST_LOG_OBJECT (ffmpegdec, "update mastering display info: "
"Red(%u, %u) "
"Green(%u, %u) "
"Blue(%u, %u) "
"White(%u, %u) "
"max_luminance(%u) "
"min_luminance(%u) ",
minfo.display_primaries[0].x, minfo.display_primaries[0].y,
minfo.display_primaries[1].x, minfo.display_primaries[1].y,
minfo.display_primaries[2].x, minfo.display_primaries[2].y,
minfo.white_point.x, minfo.white_point.y,
minfo.max_display_mastering_luminance,
minfo.min_display_mastering_luminance);
if (!gst_video_mastering_display_info_add_to_caps (&minfo,
output_state->caps)) {
GST_WARNING_OBJECT (ffmpegdec,
"Couldn't set mastering display info to caps");
}
}
}
if (!gst_structure_has_field (in_s, "content-light-level")) {
AVFrameSideData *sd = av_frame_get_side_data (picture,
AV_FRAME_DATA_CONTENT_LIGHT_LEVEL);
GstVideoContentLightLevel cll;
if (sd && content_light_metadata_av_to_gst ((AVContentLightMetadata *)
sd->data, &cll)) {
GST_LOG_OBJECT (ffmpegdec, "update content light level: "
"maxCLL:(%u), maxFALL:(%u)", cll.max_content_light_level,
cll.max_frame_average_light_level);
if (!gst_video_content_light_level_add_to_caps (&cll, output_state->caps)) {
GST_WARNING_OBJECT (ffmpegdec,
"Couldn't set content light level to caps");
}
}
}
if (!gst_video_decoder_negotiate (GST_VIDEO_DECODER (ffmpegdec)))
goto negotiate_failed;
/* The decoder is configured, we now know the true latency */
if (fps_n) {
latency =
gst_util_uint64_scale_ceil (ffmpegdec->context->has_b_frames *
GST_SECOND, fps_d, fps_n);
if (ffmpegdec->context->thread_type & FF_THREAD_FRAME) {
latency +=
gst_util_uint64_scale_ceil (ffmpegdec->context->thread_count *
GST_SECOND, fps_d, fps_n);
}
gst_video_decoder_set_latency (GST_VIDEO_DECODER (ffmpegdec), latency,
latency);
}
return TRUE;
/* ERRORS */
unknown_format:
{
GST_ERROR_OBJECT (ffmpegdec,
"decoder requires a video format unsupported by GStreamer");
return FALSE;
}
negotiate_failed:
{
/* Reset so we try again next time even if force==FALSE */
ffmpegdec->pic_pix_fmt = 0;
ffmpegdec->pic_width = 0;
ffmpegdec->pic_height = 0;
ffmpegdec->pic_par_n = 0;
ffmpegdec->pic_par_d = 0;
ffmpegdec->pic_interlaced = 0;
ffmpegdec->pic_field_order = 0;
ffmpegdec->pic_field_order_changed = FALSE;
ffmpegdec->ctx_ticks = 0;
ffmpegdec->ctx_time_n = 0;
ffmpegdec->ctx_time_d = 0;
GST_ERROR_OBJECT (ffmpegdec, "negotiation failed");
return FALSE;
}
}
/* perform qos calculations before decoding the next frame.
*
* Sets the skip_frame flag and if things are really bad, skips to the next
* keyframe.
*
*/
static void
gst_ffmpegviddec_do_qos (GstFFMpegVidDec * ffmpegdec,
GstVideoCodecFrame * frame, gboolean * mode_switch)
{
GstClockTimeDiff diff;
GstSegmentFlags skip_flags =
GST_VIDEO_DECODER_INPUT_SEGMENT (ffmpegdec).flags;
*mode_switch = FALSE;
if (frame == NULL)
return;
if (skip_flags & GST_SEGMENT_FLAG_TRICKMODE_KEY_UNITS) {
ffmpegdec->context->skip_frame = AVDISCARD_NONKEY;
*mode_switch = TRUE;
} else if (skip_flags & GST_SEGMENT_FLAG_TRICKMODE) {
ffmpegdec->context->skip_frame = AVDISCARD_NONREF;
*mode_switch = TRUE;
}
if (*mode_switch == TRUE) {
/* We've already switched mode, we can return straight away
* without any further calculation */
return;
}
diff =
gst_video_decoder_get_max_decode_time (GST_VIDEO_DECODER (ffmpegdec),
frame);
/* if we don't have timing info, then we don't do QoS */
if (G_UNLIKELY (diff == G_MAXINT64)) {
/* Ensure the skipping strategy is the default one */
ffmpegdec->context->skip_frame = ffmpegdec->skip_frame;
return;
}
GST_DEBUG_OBJECT (ffmpegdec, "decoding time %" G_GINT64_FORMAT, diff);
if (diff > 0 && ffmpegdec->context->skip_frame != AVDISCARD_DEFAULT) {
ffmpegdec->context->skip_frame = AVDISCARD_DEFAULT;
*mode_switch = TRUE;
GST_DEBUG_OBJECT (ffmpegdec, "QOS: normal mode");
}
else if (diff <= 0 && ffmpegdec->context->skip_frame != AVDISCARD_NONREF) {
ffmpegdec->context->skip_frame = AVDISCARD_NONREF;
*mode_switch = TRUE;
GST_DEBUG_OBJECT (ffmpegdec,
"QOS: hurry up, diff %" G_GINT64_FORMAT " >= 0", diff);
}
}
/* get an outbuf buffer with the current picture */
static GstFlowReturn
get_output_buffer (GstFFMpegVidDec * ffmpegdec, GstVideoCodecFrame * frame)
{
GstFlowReturn ret = GST_FLOW_OK;
AVFrame pic, *outpic;
GstVideoFrame vframe;
GstVideoInfo *info;
guint c;
GST_LOG_OBJECT (ffmpegdec, "get output buffer");
if (!ffmpegdec->output_state)
goto not_negotiated;
ret =
gst_video_decoder_allocate_output_frame (GST_VIDEO_DECODER (ffmpegdec),
frame);
if (G_UNLIKELY (ret != GST_FLOW_OK))
goto alloc_failed;
/* original ffmpeg code does not handle odd sizes correctly.
* This patched up version does */
/* Fill avpicture */
info = &ffmpegdec->output_state->info;
if (!gst_video_frame_map (&vframe, info, frame->output_buffer,
GST_MAP_READ | GST_MAP_WRITE))
goto map_failed;
memset (&pic, 0, sizeof (pic));
pic.format = ffmpegdec->pic_pix_fmt;
pic.width = GST_VIDEO_FRAME_WIDTH (&vframe);
pic.height = GST_VIDEO_FRAME_HEIGHT (&vframe);
for (c = 0; c < AV_NUM_DATA_POINTERS; c++) {
if (c < GST_VIDEO_INFO_N_PLANES (info)) {
pic.data[c] = GST_VIDEO_FRAME_PLANE_DATA (&vframe, c);
pic.linesize[c] = GST_VIDEO_FRAME_PLANE_STRIDE (&vframe, c);
GST_LOG_OBJECT (ffmpegdec, "[%i] linesize %d, data %p", c,
pic.linesize[c], pic.data[c]);
} else {
pic.data[c] = NULL;
pic.linesize[c] = 0;
}
}
outpic = ffmpegdec->picture;
if (av_frame_copy (&pic, outpic) != 0) {
GST_ERROR_OBJECT (ffmpegdec, "Failed to copy output frame");
ret = GST_FLOW_ERROR;
}
gst_video_frame_unmap (&vframe);
ffmpegdec->picture->reordered_opaque = -1;
return ret;
/* special cases */
alloc_failed:
{
GST_ELEMENT_ERROR (ffmpegdec, RESOURCE, FAILED,
("Unable to allocate memory"),
("The downstream pool failed to allocated buffer."));
return ret;
}
map_failed:
{
GST_ELEMENT_ERROR (ffmpegdec, RESOURCE, OPEN_READ_WRITE,
("Cannot access memory for read and write operation."),
("The video memory allocated from downstream pool could not mapped for"
"read and write."));
return ret;
}
not_negotiated:
{
GST_DEBUG_OBJECT (ffmpegdec, "not negotiated");
return GST_FLOW_NOT_NEGOTIATED;
}
}
static void
gst_avpacket_init (AVPacket * packet, guint8 * data, guint size)
{
memset (packet, 0, sizeof (AVPacket));
packet->data = data;
packet->size = size;
}
/*
* Returns: whether a frame was decoded
*/
static gboolean
gst_ffmpegviddec_video_frame (GstFFMpegVidDec * ffmpegdec,
GstVideoCodecFrame * frame, GstFlowReturn * ret)
{
gint res;
gboolean got_frame = FALSE;
gboolean mode_switch;
GstVideoCodecFrame *out_frame;
GstFFMpegVidDecVideoFrame *out_dframe;
GstBufferPool *pool;
*ret = GST_FLOW_OK;
/* in case we skip frames */
ffmpegdec->picture->pict_type = -1;
/* run QoS code, we don't stop decoding the frame when we are late because
* else we might skip a reference frame */
gst_ffmpegviddec_do_qos (ffmpegdec, frame, &mode_switch);
res = avcodec_receive_frame (ffmpegdec->context, ffmpegdec->picture);
/* No frames available at this time */
if (res == AVERROR (EAGAIN))
goto beach;
else if (res == AVERROR_EOF) {
*ret = GST_FLOW_EOS;
GST_DEBUG_OBJECT (ffmpegdec, "Context was entirely flushed");
goto beach;
} else if (res < 0) {
*ret = GST_FLOW_OK;
GST_WARNING_OBJECT (ffmpegdec, "Legitimate decoding error");
goto beach;
}
got_frame = TRUE;
/* get the output picture timing info again */
out_dframe = ffmpegdec->picture->opaque;
out_frame = gst_video_codec_frame_ref (out_dframe->frame);
/* also give back a buffer allocated by the frame, if any */
gst_buffer_replace (&out_frame->output_buffer, out_dframe->buffer);
gst_buffer_replace (&out_dframe->buffer, NULL);
/* Extract auxilliary info not stored in the main AVframe */
{
GstVideoInfo *in_info = &ffmpegdec->input_state->info;
/* Take multiview mode from upstream if present */
ffmpegdec->picture_multiview_mode = GST_VIDEO_INFO_MULTIVIEW_MODE (in_info);
ffmpegdec->picture_multiview_flags =
GST_VIDEO_INFO_MULTIVIEW_FLAGS (in_info);
/* Otherwise, see if there's info in the frame */
if (ffmpegdec->picture_multiview_mode == GST_VIDEO_MULTIVIEW_MODE_NONE) {
AVFrameSideData *side_data =
av_frame_get_side_data (ffmpegdec->picture, AV_FRAME_DATA_STEREO3D);
if (side_data) {
AVStereo3D *stereo = (AVStereo3D *) side_data->data;
ffmpegdec->picture_multiview_mode = stereo_av_to_gst (stereo->type);
if (stereo->flags & AV_STEREO3D_FLAG_INVERT) {
ffmpegdec->picture_multiview_flags =
GST_VIDEO_MULTIVIEW_FLAGS_RIGHT_VIEW_FIRST;
} else {
ffmpegdec->picture_multiview_flags = GST_VIDEO_MULTIVIEW_FLAGS_NONE;
}
}
}
}
GST_DEBUG_OBJECT (ffmpegdec,
"pts %" G_GUINT64_FORMAT " duration %" G_GUINT64_FORMAT,
out_frame->pts, out_frame->duration);
GST_DEBUG_OBJECT (ffmpegdec, "picture: pts %" G_GUINT64_FORMAT,
(guint64) ffmpegdec->picture->pts);
GST_DEBUG_OBJECT (ffmpegdec, "picture: num %d",
ffmpegdec->picture->coded_picture_number);
GST_DEBUG_OBJECT (ffmpegdec, "picture: display %d",
ffmpegdec->picture->display_picture_number);
GST_DEBUG_OBJECT (ffmpegdec, "picture: opaque %p",
ffmpegdec->picture->opaque);
GST_DEBUG_OBJECT (ffmpegdec, "picture: reordered opaque %" G_GUINT64_FORMAT,
(guint64) ffmpegdec->picture->reordered_opaque);
GST_DEBUG_OBJECT (ffmpegdec, "repeat_pict:%d",
ffmpegdec->picture->repeat_pict);
GST_DEBUG_OBJECT (ffmpegdec, "corrupted frame: %d",
! !(ffmpegdec->picture->flags & AV_FRAME_FLAG_CORRUPT));
if (!gst_ffmpegviddec_negotiate (ffmpegdec, ffmpegdec->context,
ffmpegdec->picture))
goto negotiation_error;
pool = gst_video_decoder_get_buffer_pool (GST_VIDEO_DECODER (ffmpegdec));
if (G_UNLIKELY (out_frame->output_buffer == NULL)) {
*ret = get_output_buffer (ffmpegdec, out_frame);
} else if (G_UNLIKELY (out_frame->output_buffer->pool != pool)) {
GstBuffer *tmp = out_frame->output_buffer;
out_frame->output_buffer = NULL;
*ret = get_output_buffer (ffmpegdec, out_frame);
gst_buffer_unref (tmp);
}
#ifndef G_DISABLE_ASSERT
else {
GstVideoMeta *vmeta = gst_buffer_get_video_meta (out_frame->output_buffer);
if (vmeta) {
GstVideoInfo *info = &ffmpegdec->output_state->info;
g_assert ((gint) vmeta->width == GST_VIDEO_INFO_WIDTH (info));
g_assert ((gint) vmeta->height == GST_VIDEO_INFO_HEIGHT (info));
}
}
#endif
gst_object_unref (pool);
if (G_UNLIKELY (*ret != GST_FLOW_OK))
goto no_output;
/* Mark corrupted frames as corrupted */
if (ffmpegdec->picture->flags & AV_FRAME_FLAG_CORRUPT)
GST_BUFFER_FLAG_SET (out_frame->output_buffer, GST_BUFFER_FLAG_CORRUPTED);
if (ffmpegdec->pic_interlaced) {
/* set interlaced flags */
if (ffmpegdec->picture->repeat_pict)
GST_BUFFER_FLAG_SET (out_frame->output_buffer, GST_VIDEO_BUFFER_FLAG_RFF);
if (ffmpegdec->picture->top_field_first)
GST_BUFFER_FLAG_SET (out_frame->output_buffer, GST_VIDEO_BUFFER_FLAG_TFF);
if (ffmpegdec->picture->interlaced_frame)
GST_BUFFER_FLAG_SET (out_frame->output_buffer,
GST_VIDEO_BUFFER_FLAG_INTERLACED);
}
{
AVFrameSideData *side_data =
av_frame_get_side_data (ffmpegdec->picture, AV_FRAME_DATA_A53_CC);
if (side_data) {
GST_LOG_OBJECT (ffmpegdec,
"Found CC side data of type AV_FRAME_DATA_A53_CC, size %d",
side_data->size);
GST_MEMDUMP ("A53 CC", side_data->data, side_data->size);
/* do not add closed caption meta if it already exists */
if (!gst_buffer_get_meta (out_frame->output_buffer,
GST_VIDEO_CAPTION_META_API_TYPE)) {
out_frame->output_buffer =
gst_buffer_make_writable (out_frame->output_buffer);
gst_buffer_add_video_caption_meta (out_frame->output_buffer,
GST_VIDEO_CAPTION_TYPE_CEA708_RAW, side_data->data,
side_data->size);
} else {
GST_LOG_OBJECT (ffmpegdec,
"Closed caption meta already exists: will not add new caption meta");
}
}
}
/* cleaning time */
/* so we decoded this frame, frames preceding it in decoding order
* that still do not have a buffer allocated seem rather useless,
* and can be discarded, due to e.g. misparsed bogus frame
* or non-keyframe in skipped decoding, ...
* In any case, not likely to be seen again, so discard those,
* before they pile up and/or mess with timestamping */
{
GList *l, *ol;
GstVideoDecoder *dec = GST_VIDEO_DECODER (ffmpegdec);
gboolean old = TRUE;
ol = l = gst_video_decoder_get_frames (dec);
while (l) {
GstVideoCodecFrame *tmp = l->data;
if (tmp == frame)
old = FALSE;
if (old && GST_VIDEO_CODEC_FRAME_IS_DECODE_ONLY (tmp)) {
GST_LOG_OBJECT (dec,
"discarding ghost frame %p (#%d) PTS:%" GST_TIME_FORMAT " DTS:%"
GST_TIME_FORMAT, tmp, tmp->system_frame_number,
GST_TIME_ARGS (tmp->pts), GST_TIME_ARGS (tmp->dts));
/* drop extra ref and remove from frame list */
gst_video_decoder_release_frame (dec, tmp);
} else {
/* drop extra ref we got */
gst_video_codec_frame_unref (tmp);
}
l = l->next;
}
g_list_free (ol);
}
av_frame_unref (ffmpegdec->picture);
/* FIXME: Ideally we would remap the buffer read-only now before pushing but
* libav might still have a reference to it!
*/
*ret =
gst_video_decoder_finish_frame (GST_VIDEO_DECODER (ffmpegdec), out_frame);
beach:
GST_DEBUG_OBJECT (ffmpegdec, "return flow %s, got frame: %d",
gst_flow_get_name (*ret), got_frame);
return got_frame;
/* special cases */
no_output:
{
GST_DEBUG_OBJECT (ffmpegdec, "no output buffer");
gst_video_decoder_drop_frame (GST_VIDEO_DECODER (ffmpegdec), out_frame);
goto beach;
}
negotiation_error:
{
if (GST_PAD_IS_FLUSHING (GST_VIDEO_DECODER_SRC_PAD (ffmpegdec))) {
*ret = GST_FLOW_FLUSHING;
goto beach;
}
GST_WARNING_OBJECT (ffmpegdec, "Error negotiating format");
*ret = GST_FLOW_NOT_NEGOTIATED;
goto beach;
}
}
/* Returns: Whether a frame was decoded */
static gboolean
gst_ffmpegviddec_frame (GstFFMpegVidDec * ffmpegdec, GstVideoCodecFrame * frame,
GstFlowReturn * ret)
{
gboolean got_frame = FALSE;
if (G_UNLIKELY (ffmpegdec->context->codec == NULL))
goto no_codec;
*ret = GST_FLOW_OK;
ffmpegdec->context->frame_number++;
got_frame = gst_ffmpegviddec_video_frame (ffmpegdec, frame, ret);
return got_frame;
/* ERRORS */
no_codec:
{
GST_ERROR_OBJECT (ffmpegdec, "no codec context");
*ret = GST_FLOW_NOT_NEGOTIATED;
return -1;
}
}
static GstFlowReturn
gst_ffmpegviddec_drain (GstVideoDecoder * decoder)
{
GstFFMpegVidDec *ffmpegdec = (GstFFMpegVidDec *) decoder;
GstFlowReturn ret;
gboolean got_frame = FALSE;
if (!ffmpegdec->opened)
return GST_FLOW_OK;
if (avcodec_send_packet (ffmpegdec->context, NULL))
goto send_packet_failed;
do {
got_frame = gst_ffmpegviddec_frame (ffmpegdec, NULL, &ret);
} while (got_frame && ret == GST_FLOW_OK);
avcodec_flush_buffers (ffmpegdec->context);
done:
return GST_FLOW_OK;
send_packet_failed:
GST_WARNING_OBJECT (ffmpegdec, "send packet failed, could not drain decoder");
goto done;
}
static GstFlowReturn
gst_ffmpegviddec_handle_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame)
{
GstFFMpegVidDec *ffmpegdec = (GstFFMpegVidDec *) decoder;
guint8 *data;
gint size;
gboolean got_frame;
GstMapInfo minfo;
GstFlowReturn ret = GST_FLOW_OK;
AVPacket packet;
GST_LOG_OBJECT (ffmpegdec,
"Received new data of size %" G_GSIZE_FORMAT ", dts %" GST_TIME_FORMAT
", pts:%" GST_TIME_FORMAT ", dur:%" GST_TIME_FORMAT,
gst_buffer_get_size (frame->input_buffer), GST_TIME_ARGS (frame->dts),
GST_TIME_ARGS (frame->pts), GST_TIME_ARGS (frame->duration));
if (!gst_buffer_map (frame->input_buffer, &minfo, GST_MAP_READ)) {
GST_ELEMENT_ERROR (ffmpegdec, STREAM, DECODE, ("Decoding problem"),
("Failed to map buffer for reading"));
return GST_FLOW_ERROR;
}
/* treat frame as void until a buffer is requested for it */
GST_VIDEO_CODEC_FRAME_FLAG_SET (frame,
GST_VIDEO_CODEC_FRAME_FLAG_DECODE_ONLY);
data = minfo.data;
size = minfo.size;
if (size > 0 && (!GST_MEMORY_IS_ZERO_PADDED (minfo.memory)
|| (minfo.maxsize - minfo.size) < AV_INPUT_BUFFER_PADDING_SIZE)) {
/* add padding */
if (ffmpegdec->padded_size < size + AV_INPUT_BUFFER_PADDING_SIZE) {
ffmpegdec->padded_size = size + AV_INPUT_BUFFER_PADDING_SIZE;
ffmpegdec->padded = g_realloc (ffmpegdec->padded, ffmpegdec->padded_size);
GST_LOG_OBJECT (ffmpegdec, "resized padding buffer to %d",
ffmpegdec->padded_size);
}
GST_CAT_TRACE_OBJECT (GST_CAT_PERFORMANCE, ffmpegdec,
"Copy input to add padding");
memcpy (ffmpegdec->padded, data, size);
memset (ffmpegdec->padded + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
data = ffmpegdec->padded;
}
/* now decode the frame */
gst_avpacket_init (&packet, data, size);
if (ffmpegdec->palette) {
guint8 *pal;
pal = av_packet_new_side_data (&packet, AV_PKT_DATA_PALETTE,
AVPALETTE_SIZE);
gst_buffer_extract (ffmpegdec->palette, 0, pal, AVPALETTE_SIZE);
GST_DEBUG_OBJECT (ffmpegdec, "copy pal %p %p", &packet, pal);
}
if (!packet.size)
goto done;
/* save reference to the timing info */
ffmpegdec->context->reordered_opaque = (gint64) frame->system_frame_number;
ffmpegdec->picture->reordered_opaque = (gint64) frame->system_frame_number;
GST_DEBUG_OBJECT (ffmpegdec, "stored opaque values idx %d",
frame->system_frame_number);
/* This might call into get_buffer() from another thread,
* which would cause a deadlock. Release the lock here
* and taking it again later seems safe
* See https://bugzilla.gnome.org/show_bug.cgi?id=726020
*/
GST_VIDEO_DECODER_STREAM_UNLOCK (ffmpegdec);
if (avcodec_send_packet (ffmpegdec->context, &packet) < 0) {
GST_VIDEO_DECODER_STREAM_LOCK (ffmpegdec);
goto send_packet_failed;
}
GST_VIDEO_DECODER_STREAM_LOCK (ffmpegdec);
do {
/* decode a frame of audio/video now */
got_frame = gst_ffmpegviddec_frame (ffmpegdec, frame, &ret);
if (ret != GST_FLOW_OK) {
GST_LOG_OBJECT (ffmpegdec, "breaking because of flow ret %s",
gst_flow_get_name (ret));
break;
}
} while (got_frame);
done:
gst_buffer_unmap (frame->input_buffer, &minfo);
gst_video_codec_frame_unref (frame);
return ret;
send_packet_failed:
{
GST_WARNING_OBJECT (ffmpegdec, "Failed to send data for decoding");
goto done;
}
}
static gboolean
gst_ffmpegviddec_start (GstVideoDecoder * decoder)
{
GstFFMpegVidDec *ffmpegdec = (GstFFMpegVidDec *) decoder;
GstFFMpegVidDecClass *oclass;
oclass = (GstFFMpegVidDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
GST_OBJECT_LOCK (ffmpegdec);
gst_ffmpeg_avcodec_close (ffmpegdec->context);
if (avcodec_get_context_defaults3 (ffmpegdec->context, oclass->in_plugin) < 0) {
GST_DEBUG_OBJECT (ffmpegdec, "Failed to set context defaults");
GST_OBJECT_UNLOCK (ffmpegdec);
return FALSE;
}
ffmpegdec->context->opaque = ffmpegdec;
GST_OBJECT_UNLOCK (ffmpegdec);
return TRUE;
}
static gboolean
gst_ffmpegviddec_stop (GstVideoDecoder * decoder)
{
GstFFMpegVidDec *ffmpegdec = (GstFFMpegVidDec *) decoder;
GST_OBJECT_LOCK (ffmpegdec);
gst_ffmpegviddec_close (ffmpegdec, FALSE);
GST_OBJECT_UNLOCK (ffmpegdec);
g_free (ffmpegdec->padded);
ffmpegdec->padded = NULL;
ffmpegdec->padded_size = 0;
if (ffmpegdec->input_state)
gst_video_codec_state_unref (ffmpegdec->input_state);
ffmpegdec->input_state = NULL;
if (ffmpegdec->output_state)
gst_video_codec_state_unref (ffmpegdec->output_state);
ffmpegdec->output_state = NULL;
if (ffmpegdec->internal_pool)
gst_object_unref (ffmpegdec->internal_pool);
ffmpegdec->internal_pool = NULL;
ffmpegdec->pic_pix_fmt = 0;
ffmpegdec->pic_width = 0;
ffmpegdec->pic_height = 0;
ffmpegdec->pic_par_n = 0;
ffmpegdec->pic_par_d = 0;
ffmpegdec->pic_interlaced = 0;
ffmpegdec->pic_field_order = 0;
ffmpegdec->pic_field_order_changed = FALSE;
ffmpegdec->ctx_ticks = 0;
ffmpegdec->ctx_time_n = 0;
ffmpegdec->ctx_time_d = 0;
ffmpegdec->pool_width = 0;
ffmpegdec->pool_height = 0;
ffmpegdec->pool_format = 0;
return TRUE;
}
static GstFlowReturn
gst_ffmpegviddec_finish (GstVideoDecoder * decoder)
{
gst_ffmpegviddec_drain (decoder);
/* note that finish can and should clean up more drastically,
* but drain is also invoked on e.g. packet loss in GAP handling */
gst_ffmpegviddec_flush (decoder);
return GST_FLOW_OK;
}
static gboolean
gst_ffmpegviddec_flush (GstVideoDecoder * decoder)
{
GstFFMpegVidDec *ffmpegdec = (GstFFMpegVidDec *) decoder;
if (ffmpegdec->opened) {
GST_LOG_OBJECT (decoder, "flushing buffers");
avcodec_flush_buffers (ffmpegdec->context);
}
return TRUE;
}
static gboolean
gst_ffmpegviddec_decide_allocation (GstVideoDecoder * decoder, GstQuery * query)
{
GstFFMpegVidDec *ffmpegdec = (GstFFMpegVidDec *) decoder;
GstVideoCodecState *state;
GstBufferPool *pool;
guint size, min, max;
GstStructure *config;
gboolean have_pool, have_videometa, have_alignment, update_pool = FALSE;
GstAllocator *allocator = NULL;
GstAllocationParams params = DEFAULT_ALLOC_PARAM;
have_pool = (gst_query_get_n_allocation_pools (query) != 0);
if (!GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation (decoder,
query))
return FALSE;
state = gst_video_decoder_get_output_state (decoder);
if (gst_query_get_n_allocation_params (query) > 0) {
gst_query_parse_nth_allocation_param (query, 0, &allocator, &params);
params.align = MAX (params.align, DEFAULT_STRIDE_ALIGN);
} else {
gst_query_add_allocation_param (query, allocator, &params);
}
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
/* Don't use pool that can't grow, as we don't know how many buffer we'll
* need, otherwise we may stall */
if (max != 0 && max < REQUIRED_POOL_MAX_BUFFERS) {
gst_object_unref (pool);
pool = gst_video_buffer_pool_new ();
max = 0;
update_pool = TRUE;
have_pool = FALSE;
/* if there is an allocator, also drop it, as it might be the reason we
* have this limit. Default will be used */
if (allocator) {
gst_object_unref (allocator);
allocator = NULL;
}
}
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, state->caps, size, min, max);
gst_buffer_pool_config_set_allocator (config, allocator, &params);
have_videometa =
gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
if (have_videometa)
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
have_alignment =
gst_buffer_pool_has_option (pool, GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT);
/* If we have videometa, we never have to copy */
if (have_videometa && have_pool && have_alignment &&
gst_ffmpegviddec_can_direct_render (ffmpegdec)) {
GstStructure *config_copy = gst_structure_copy (config);
gst_ffmpegvideodec_prepare_dr_pool (ffmpegdec, pool, &state->info,
config_copy);
/* FIXME validate and retry */
if (gst_buffer_pool_set_config (pool, config_copy)) {
GstFlowReturn ret;
GstBuffer *tmp;
gst_buffer_pool_set_active (pool, TRUE);
ret = gst_buffer_pool_acquire_buffer (pool, &tmp, NULL);
if (ret == GST_FLOW_OK) {
GstVideoMeta *vmeta = gst_buffer_get_video_meta (tmp);
gboolean same_stride = TRUE;
guint i;
for (i = 0; i < vmeta->n_planes; i++) {
if (vmeta->stride[i] != ffmpegdec->stride[i]) {
same_stride = FALSE;
break;
}
}
gst_buffer_unref (tmp);
if (same_stride) {
if (ffmpegdec->internal_pool)
gst_object_unref (ffmpegdec->internal_pool);
ffmpegdec->internal_pool = gst_object_ref (pool);
ffmpegdec->pool_info = state->info;
gst_structure_free (config);
goto done;
}
}
}
}
if (have_videometa && ffmpegdec->internal_pool
&& ffmpegdec->pool_width == state->info.width
&& ffmpegdec->pool_height == state->info.height) {
update_pool = TRUE;
gst_object_unref (pool);
pool = gst_object_ref (ffmpegdec->internal_pool);
gst_structure_free (config);
goto done;
}
/* configure */
if (!gst_buffer_pool_set_config (pool, config)) {
gboolean working_pool = FALSE;
config = gst_buffer_pool_get_config (pool);
if (gst_buffer_pool_config_validate_params (config, state->caps, size, min,
max)) {
working_pool = gst_buffer_pool_set_config (pool, config);
} else {
gst_structure_free (config);
}
if (!working_pool) {
gst_object_unref (pool);
pool = gst_video_buffer_pool_new ();
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, state->caps, size, min, max);
gst_buffer_pool_config_set_allocator (config, NULL, &params);
gst_buffer_pool_set_config (pool, config);
update_pool = TRUE;
}
}
done:
/* and store */
if (update_pool)
gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
gst_object_unref (pool);
if (allocator)
gst_object_unref (allocator);
gst_video_codec_state_unref (state);
return TRUE;
}
static gboolean
gst_ffmpegviddec_propose_allocation (GstVideoDecoder * decoder,
GstQuery * query)
{
GstAllocationParams params;
gst_allocation_params_init (&params);
params.flags = GST_MEMORY_FLAG_ZERO_PADDED;
params.align = DEFAULT_STRIDE_ALIGN;
params.padding = AV_INPUT_BUFFER_PADDING_SIZE;
/* we would like to have some padding so that we don't have to
* memcpy. We don't suggest an allocator. */
gst_query_add_allocation_param (query, NULL, &params);
return GST_VIDEO_DECODER_CLASS (parent_class)->propose_allocation (decoder,
query);
}
static void
gst_ffmpegviddec_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstFFMpegVidDec *ffmpegdec = (GstFFMpegVidDec *) object;
switch (prop_id) {
case PROP_LOWRES:
ffmpegdec->lowres = ffmpegdec->context->lowres = g_value_get_enum (value);
break;
case PROP_SKIPFRAME:
ffmpegdec->skip_frame = ffmpegdec->context->skip_frame =
g_value_get_enum (value);
break;
case PROP_DIRECT_RENDERING:
ffmpegdec->direct_rendering = g_value_get_boolean (value);
break;
case PROP_DEBUG_MV:
ffmpegdec->debug_mv = ffmpegdec->context->debug_mv =
g_value_get_boolean (value);
break;
case PROP_MAX_THREADS:
ffmpegdec->max_threads = g_value_get_int (value);
break;
case PROP_OUTPUT_CORRUPT:
ffmpegdec->output_corrupt = g_value_get_boolean (value);
break;
case PROP_THREAD_TYPE:
ffmpegdec->thread_type = g_value_get_flags (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_ffmpegviddec_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstFFMpegVidDec *ffmpegdec = (GstFFMpegVidDec *) object;
switch (prop_id) {
case PROP_LOWRES:
g_value_set_enum (value, ffmpegdec->context->lowres);
break;
case PROP_SKIPFRAME:
g_value_set_enum (value, ffmpegdec->context->skip_frame);
break;
case PROP_DIRECT_RENDERING:
g_value_set_boolean (value, ffmpegdec->direct_rendering);
break;
case PROP_DEBUG_MV:
g_value_set_boolean (value, ffmpegdec->context->debug_mv);
break;
case PROP_MAX_THREADS:
g_value_set_int (value, ffmpegdec->max_threads);
break;
case PROP_OUTPUT_CORRUPT:
g_value_set_boolean (value, ffmpegdec->output_corrupt);
break;
case PROP_THREAD_TYPE:
g_value_set_flags (value, ffmpegdec->thread_type);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
gboolean
gst_ffmpegviddec_register (GstPlugin * plugin)
{
GTypeInfo typeinfo = {
sizeof (GstFFMpegVidDecClass),
(GBaseInitFunc) gst_ffmpegviddec_base_init,
NULL,
(GClassInitFunc) gst_ffmpegviddec_class_init,
NULL,
NULL,
sizeof (GstFFMpegVidDec),
0,
(GInstanceInitFunc) gst_ffmpegviddec_init,
};
GType type;
AVCodec *in_plugin;
gint rank;
void *i = 0;
GST_LOG ("Registering decoders");
while ((in_plugin = (AVCodec *) av_codec_iterate (&i))) {
gchar *type_name;
gchar *plugin_name;
/* only video decoders */
if (!av_codec_is_decoder (in_plugin)
|| in_plugin->type != AVMEDIA_TYPE_VIDEO)
continue;
/* no quasi codecs, please */
if (in_plugin->id == AV_CODEC_ID_RAWVIDEO ||
in_plugin->id == AV_CODEC_ID_V210 ||
in_plugin->id == AV_CODEC_ID_V210X ||
in_plugin->id == AV_CODEC_ID_V308 ||
in_plugin->id == AV_CODEC_ID_V408 ||
in_plugin->id == AV_CODEC_ID_V410 ||
in_plugin->id == AV_CODEC_ID_R210
|| in_plugin->id == AV_CODEC_ID_AYUV
|| in_plugin->id == AV_CODEC_ID_Y41P
|| in_plugin->id == AV_CODEC_ID_012V
|| in_plugin->id == AV_CODEC_ID_YUV4
#if AV_VERSION_INT (LIBAVCODEC_VERSION_MAJOR, LIBAVCODEC_VERSION_MINOR, LIBAVCODEC_VERSION_MICRO) >= \
AV_VERSION_INT (57,4,0)
|| in_plugin->id == AV_CODEC_ID_WRAPPED_AVFRAME
#endif
|| in_plugin->id == AV_CODEC_ID_ZLIB) {
continue;
}
/* No decoders depending on external libraries (we don't build them, but
* people who build against an external ffmpeg might have them.
* We have native gstreamer plugins for all of those libraries anyway. */
if (!strncmp (in_plugin->name, "lib", 3)) {
GST_DEBUG
("Not using external library decoder %s. Use the gstreamer-native ones instead.",
in_plugin->name);
continue;
}
/* Skip hardware or hybrid (hardware with software fallback) */
if ((in_plugin->capabilities & AV_CODEC_CAP_HARDWARE) ==
AV_CODEC_CAP_HARDWARE) {
GST_DEBUG
("Ignoring hardware decoder %s. We can't handle this outside of ffmpeg",
in_plugin->name);
continue;
}
if ((in_plugin->capabilities & AV_CODEC_CAP_HYBRID) == AV_CODEC_CAP_HYBRID) {
GST_DEBUG
("Ignoring hybrid decoder %s. We can't handle this outside of ffmpeg",
in_plugin->name);
continue;
}
/* No vdpau plugins until we can figure out how to properly use them
* outside of ffmpeg. */
if (g_str_has_suffix (in_plugin->name, "_vdpau")) {
GST_DEBUG
("Ignoring VDPAU decoder %s. We can't handle this outside of ffmpeg",
in_plugin->name);
continue;
}
if (g_str_has_suffix (in_plugin->name, "_xvmc")) {
GST_DEBUG
("Ignoring XVMC decoder %s. We can't handle this outside of ffmpeg",
in_plugin->name);
continue;
}
if (strstr (in_plugin->name, "vaapi")) {
GST_DEBUG
("Ignoring VAAPI decoder %s. We can't handle this outside of ffmpeg",
in_plugin->name);
continue;
}
if (g_str_has_suffix (in_plugin->name, "_qsv")) {
GST_DEBUG
("Ignoring qsv decoder %s. We can't handle this outside of ffmpeg",
in_plugin->name);
continue;
}
GST_DEBUG ("Trying plugin %s [%s]", in_plugin->name, in_plugin->long_name);
/* no codecs for which we're GUARANTEED to have better alternatives */
/* MPEG1VIDEO : the mpeg2video decoder is preferred */
/* MP1 : Use MP3 for decoding */
/* MP2 : Use MP3 for decoding */
/* Theora: Use libtheora based theoradec */
/* CDG: use cdgdec */
if (!strcmp (in_plugin->name, "theora") ||
!strcmp (in_plugin->name, "mpeg1video") ||
strstr (in_plugin->name, "crystalhd") != NULL ||
!strcmp (in_plugin->name, "ass") ||
!strcmp (in_plugin->name, "srt") ||
!strcmp (in_plugin->name, "pgssub") ||
!strcmp (in_plugin->name, "dvdsub") ||
!strcmp (in_plugin->name, "dvbsub") ||
!strcmp (in_plugin->name, "cdgraphics")) {
GST_LOG ("Ignoring decoder %s", in_plugin->name);
continue;
}
/* construct the type */
if (!strcmp (in_plugin->name, "hevc")) {
plugin_name = g_strdup ("h265");
} else {
plugin_name = g_strdup ((gchar *) in_plugin->name);
}
g_strdelimit (plugin_name, NULL, '_');
type_name = g_strdup_printf ("avdec_%s", plugin_name);
g_free (plugin_name);
type = g_type_from_name (type_name);
if (!type) {
/* create the gtype now */
type =
g_type_register_static (GST_TYPE_VIDEO_DECODER, type_name, &typeinfo,
0);
g_type_set_qdata (type, GST_FFDEC_PARAMS_QDATA, (gpointer) in_plugin);
}
/* (Ronald) MPEG-4 gets a higher priority because it has been well-
* tested and by far outperforms divxdec/xviddec - so we prefer it.
* msmpeg4v3 same, as it outperforms divxdec for divx3 playback.
* VC1/WMV3 are not working and thus unpreferred for now. */
switch (in_plugin->id) {
case AV_CODEC_ID_MPEG1VIDEO:
case AV_CODEC_ID_MPEG2VIDEO:
case AV_CODEC_ID_MPEG4:
case AV_CODEC_ID_MSMPEG4V3:
case AV_CODEC_ID_H264:
case AV_CODEC_ID_HEVC:
case AV_CODEC_ID_RV10:
case AV_CODEC_ID_RV20:
case AV_CODEC_ID_RV30:
case AV_CODEC_ID_RV40:
rank = GST_RANK_PRIMARY;
break;
/* DVVIDEO: we have a good dv decoder, fast on both ppc as well as x86.
* They say libdv's quality is better though. leave as secondary.
* note: if you change this, see the code in gstdv.c in good/ext/dv.
*/
case AV_CODEC_ID_DVVIDEO:
rank = GST_RANK_SECONDARY;
break;
default:
rank = GST_RANK_MARGINAL;
break;
}
if (!gst_element_register (plugin, type_name, rank, type)) {
g_warning ("Failed to register %s", type_name);
g_free (type_name);
return FALSE;
}
g_free (type_name);
}
GST_LOG ("Finished Registering decoders");
return TRUE;
}
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