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gstreamer/ext/libav/gstavviddec.c
Arnaud Vrac 4a2054c6aa avviddec: increase bottom padding for output frames 
libav can write slightly after the plane end in some SIMD optimized
functions. The extra padding value needs to be at least 16+stride_align
for each plane, so just increase the bottom padding value for the output
frame.

https://bugzilla.gnome.org/show_bug.cgi?id=694299
2013-07-18 16:24:18 +02:00

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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 <gst/gst.h>
#include <gst/video/video.h>
#include <gst/video/gstvideodecoder.h>
#include <gst/video/gstvideometa.h>
#include <gst/video/gstvideopool.h>
#include "gstav.h"
#include "gstavcodecmap.h"
#include "gstavutils.h"
#include "gstavviddec.h"
GST_DEBUG_CATEGORY_EXTERN (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
enum
{
PROP_0,
PROP_LOWRES,
PROP_SKIPFRAME,
PROP_DIRECT_RENDERING,
PROP_DEBUG_MV,
PROP_MAX_THREADS,
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_stop (GstVideoDecoder * decoder);
static gboolean gst_ffmpegviddec_reset (GstVideoDecoder * decoder,
gboolean hard);
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,
gboolean force);
/* some sort of bufferpool handling, but different */
static int gst_ffmpegviddec_get_buffer (AVCodecContext * context,
AVFrame * picture);
static int gst_ffmpegviddec_reget_buffer (AVCodecContext * context,
AVFrame * picture);
static void gst_ffmpegviddec_release_buffer (AVCodecContext * context,
AVFrame * picture);
static GstFlowReturn gst_ffmpegviddec_finish (GstVideoDecoder * decoder);
static void gst_ffmpegviddec_drain (GstFFMpegVidDec * ffmpegdec);
#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 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);
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));
caps = klass->in_plugin->capabilities;
if (caps & (CODEC_CAP_FRAME_THREADS | 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));
}
viddec_class->set_format = gst_ffmpegviddec_set_format;
viddec_class->handle_frame = gst_ffmpegviddec_handle_frame;
viddec_class->stop = gst_ffmpegviddec_stop;
viddec_class->reset = gst_ffmpegviddec_reset;
viddec_class->finish = gst_ffmpegviddec_finish;
viddec_class->decide_allocation = gst_ffmpegviddec_decide_allocation;
viddec_class->propose_allocation = gst_ffmpegviddec_propose_allocation;
}
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->picture = avcodec_alloc_frame ();
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;
}
static void
gst_ffmpegviddec_finalize (GObject * object)
{
GstFFMpegVidDec *ffmpegdec = (GstFFMpegVidDec *) object;
if (ffmpegdec->context != NULL) {
av_free (ffmpegdec->context);
ffmpegdec->context = NULL;
}
avcodec_free_frame (&ffmpegdec->picture);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/* with LOCK */
static void
gst_ffmpegviddec_close (GstFFMpegVidDec * ffmpegdec)
{
GST_LOG_OBJECT (ffmpegdec, "closing ffmpeg codec");
gst_caps_replace (&ffmpegdec->last_caps, NULL);
if (ffmpegdec->context->priv_data)
gst_ffmpeg_avcodec_close (ffmpegdec->context);
ffmpegdec->opened = FALSE;
gst_buffer_replace (&ffmpegdec->palette, NULL);
if (ffmpegdec->context->extradata) {
av_free (ffmpegdec->context->extradata);
ffmpegdec->context->extradata = NULL;
}
}
/* with LOCK */
static gboolean
gst_ffmpegviddec_open (GstFFMpegVidDec * ffmpegdec)
{
GstFFMpegVidDecClass *oclass;
oclass = (GstFFMpegVidDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
if (gst_ffmpeg_avcodec_open (ffmpegdec->context, oclass->in_plugin) < 0)
goto could_not_open;
ffmpegdec->opened = TRUE;
ffmpegdec->is_realvideo = FALSE;
GST_LOG_OBJECT (ffmpegdec, "Opened libav codec %s, id %d",
oclass->in_plugin->name, oclass->in_plugin->id);
switch (oclass->in_plugin->id) {
case AV_CODEC_ID_RV10:
case AV_CODEC_ID_RV30:
case AV_CODEC_ID_RV20:
case AV_CODEC_ID_RV40:
ffmpegdec->is_realvideo = TRUE;
break;
default:
GST_LOG_OBJECT (ffmpegdec, "Parser deactivated for format");
break;
}
return TRUE;
/* ERRORS */
could_not_open:
{
gst_ffmpegviddec_close (ffmpegdec);
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_drain (ffmpegdec);
GST_OBJECT_LOCK (ffmpegdec);
gst_ffmpegviddec_close (ffmpegdec);
}
gst_caps_replace (&ffmpegdec->last_caps, state->caps);
/* set buffer functions */
ffmpegdec->context->get_buffer = gst_ffmpegviddec_get_buffer;
ffmpegdec->context->reget_buffer = gst_ffmpegviddec_reget_buffer;
ffmpegdec->context->release_buffer = gst_ffmpegviddec_release_buffer;
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;
{
GstQuery *query;
gboolean is_live;
if (ffmpegdec->max_threads == 0) {
if (!(oclass->in_plugin->capabilities & CODEC_CAP_AUTO_THREADS))
ffmpegdec->context->thread_count = gst_ffmpeg_auto_max_threads ();
else
ffmpegdec->context->thread_count = 0;
} else
ffmpegdec->context->thread_count = ffmpegdec->max_threads;
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;
}
/* 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);
}
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
{
GstVideoCodecFrame *frame;
gboolean mapped;
GstVideoFrame vframe;
} GstFFMpegVidDecVideoFrame;
static GstFFMpegVidDecVideoFrame *
gst_ffmpegviddec_video_frame_new (GstVideoCodecFrame * frame)
{
GstFFMpegVidDecVideoFrame *dframe;
dframe = g_slice_new0 (GstFFMpegVidDecVideoFrame);
dframe->frame = frame;
return dframe;
}
static void
gst_ffmpegviddec_video_frame_free (GstFFMpegVidDecVideoFrame * frame)
{
if (frame->mapped)
gst_video_frame_unmap (&frame->vframe);
gst_video_codec_frame_unref (frame->frame);
g_slice_free (GstFFMpegVidDecVideoFrame, frame);
}
/* 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_buffer (AVCodecContext * context, AVFrame * picture)
{
GstVideoCodecFrame *frame;
GstFFMpegVidDecVideoFrame *dframe;
GstFFMpegVidDec *ffmpegdec;
gint c;
GstVideoInfo *info;
GstFlowReturn ret;
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 */
picture->reordered_opaque = context->reordered_opaque;
frame =
gst_video_decoder_get_frame (GST_VIDEO_DECODER (ffmpegdec),
picture->reordered_opaque);
if (G_UNLIKELY (frame == NULL))
goto no_frame;
if (G_UNLIKELY (frame->output_buffer != NULL))
goto duplicate_frame;
/* GstFFMpegVidDecVideoFrame receives the frame ref */
picture->opaque = dframe = gst_ffmpegviddec_video_frame_new (frame);
GST_DEBUG_OBJECT (ffmpegdec, "storing opaque %p", dframe);
ffmpegdec->context->pix_fmt = context->pix_fmt;
/* see if we need renegotiation */
if (G_UNLIKELY (!gst_ffmpegviddec_negotiate (ffmpegdec, FALSE)))
goto negotiate_failed;
if (!ffmpegdec->current_dr)
goto no_dr;
ret =
gst_video_decoder_allocate_output_frame (GST_VIDEO_DECODER (ffmpegdec),
frame);
if (ret != GST_FLOW_OK)
goto alloc_failed;
/* Fill avpicture */
info = &ffmpegdec->output_state->info;
if (!gst_video_frame_map (&dframe->vframe, info, dframe->frame->output_buffer,
GST_MAP_READWRITE))
goto invalid_frame;
dframe->mapped = TRUE;
for (c = 0; c < AV_NUM_DATA_POINTERS; c++) {
if (c < GST_VIDEO_INFO_N_PLANES (info)) {
picture->data[c] = GST_VIDEO_FRAME_PLANE_DATA (&dframe->vframe, c);
picture->linesize[c] = GST_VIDEO_FRAME_PLANE_STRIDE (&dframe->vframe, c);
} else {
picture->data[c] = NULL;
picture->linesize[c] = 0;
}
GST_LOG_OBJECT (ffmpegdec, "linesize %d, data %p", picture->linesize[c],
picture->data[c]);
}
/* tell ffmpeg we own this buffer, tranfer the ref we have on the buffer to
* the opaque data. */
picture->type = FF_BUFFER_TYPE_USER;
GST_LOG_OBJECT (ffmpegdec, "returned frame %p", frame->output_buffer);
return 0;
/* fallbacks */
negotiate_failed:
{
GST_DEBUG_OBJECT (ffmpegdec, "negotiate failed");
goto fallback;
}
no_dr:
{
GST_LOG_OBJECT (ffmpegdec, "direct rendering disabled, fallback alloc");
goto fallback;
}
alloc_failed:
{
/* alloc default buffer when we can't get one from downstream */
GST_LOG_OBJECT (ffmpegdec, "alloc failed, fallback alloc");
goto fallback;
}
invalid_frame:
{
/* alloc default buffer when we can't get one from downstream */
GST_LOG_OBJECT (ffmpegdec, "failed to map frame, fallback alloc");
gst_buffer_unref (frame->output_buffer);
frame->output_buffer = NULL;
goto fallback;
}
fallback:
{
return avcodec_default_get_buffer (context, picture);
}
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 int
gst_ffmpegviddec_reget_buffer (AVCodecContext * context, AVFrame * picture)
{
GstVideoCodecFrame *frame;
GstFFMpegVidDecVideoFrame *dframe;
GstFFMpegVidDec *ffmpegdec;
ffmpegdec = (GstFFMpegVidDec *) context->opaque;
GST_DEBUG_OBJECT (ffmpegdec, "regetting buffer picture %p", picture);
picture->reordered_opaque = context->reordered_opaque;
/* if there is no opaque, we didn't yet attach any frame to it. What usually
* happens is that avcodec_default_reget_buffer will call the getbuffer
* function. */
dframe = picture->opaque;
if (dframe == NULL)
goto done;
frame =
gst_video_decoder_get_frame (GST_VIDEO_DECODER (ffmpegdec),
picture->reordered_opaque);
if (G_UNLIKELY (frame == NULL))
goto no_frame;
if (G_UNLIKELY (frame->output_buffer != NULL))
goto duplicate_frame;
/* replace the frame, this one contains the pts/dts for the correspoding input
* buffer, which we need after decoding. */
gst_video_codec_frame_unref (dframe->frame);
dframe->frame = frame;
done:
return avcodec_default_reget_buffer (context, picture);
/* ERRORS */
no_frame:
{
GST_WARNING_OBJECT (ffmpegdec, "Couldn't get codec frame !");
return -1;
}
duplicate_frame:
{
GST_WARNING_OBJECT (ffmpegdec, "already alloc'ed output buffer for frame");
return -1;
}
}
/* called when ffmpeg is done with our buffer */
static void
gst_ffmpegviddec_release_buffer (AVCodecContext * context, AVFrame * picture)
{
gint i;
GstFFMpegVidDecVideoFrame *frame;
GstFFMpegVidDec *ffmpegdec;
ffmpegdec = (GstFFMpegVidDec *) context->opaque;
frame = (GstFFMpegVidDecVideoFrame *) picture->opaque;
GST_DEBUG_OBJECT (ffmpegdec, "release frame %d",
frame->frame->system_frame_number);
/* check if it was our buffer */
if (picture->type != FF_BUFFER_TYPE_USER) {
GST_DEBUG_OBJECT (ffmpegdec, "default release buffer");
avcodec_default_release_buffer (context, picture);
}
/* we remove the opaque data now */
picture->opaque = NULL;
gst_ffmpegviddec_video_frame_free (frame);
/* zero out the reference in ffmpeg */
for (i = 0; i < 4; i++) {
picture->data[i] = NULL;
picture->linesize[i] = 0;
}
}
static gboolean
update_video_context (GstFFMpegVidDec * ffmpegdec, gboolean force)
{
AVCodecContext *context = ffmpegdec->context;
if (!force && ffmpegdec->ctx_width == context->width
&& ffmpegdec->ctx_height == context->height
&& ffmpegdec->ctx_ticks == context->ticks_per_frame
&& ffmpegdec->ctx_time_n == context->time_base.num
&& ffmpegdec->ctx_time_d == context->time_base.den
&& ffmpegdec->ctx_pix_fmt == context->pix_fmt
&& ffmpegdec->ctx_par_n == context->sample_aspect_ratio.num
&& ffmpegdec->ctx_par_d == context->sample_aspect_ratio.den)
return FALSE;
GST_DEBUG_OBJECT (ffmpegdec,
"Renegotiating video from %dx%d@ %d:%d PAR %d/%d fps to %dx%d@ %d:%d PAR %d/%d fps pixfmt %d",
ffmpegdec->ctx_width, ffmpegdec->ctx_height,
ffmpegdec->ctx_par_n, ffmpegdec->ctx_par_d,
ffmpegdec->ctx_time_n, ffmpegdec->ctx_time_d,
context->width, context->height,
context->sample_aspect_ratio.num,
context->sample_aspect_ratio.den,
context->time_base.num, context->time_base.den, context->pix_fmt);
ffmpegdec->ctx_width = context->width;
ffmpegdec->ctx_height = context->height;
ffmpegdec->ctx_ticks = context->ticks_per_frame;
ffmpegdec->ctx_time_n = context->time_base.num;
ffmpegdec->ctx_time_d = context->time_base.den;
ffmpegdec->ctx_pix_fmt = context->pix_fmt;
ffmpegdec->ctx_par_n = context->sample_aspect_ratio.num;
ffmpegdec->ctx_par_d = context->sample_aspect_ratio.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->ctx_par_n && ffmpegdec->ctx_par_d) {
decoder_num = ffmpegdec->ctx_par_n;
decoder_denom = ffmpegdec->ctx_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 gboolean
gst_ffmpegviddec_negotiate (GstFFMpegVidDec * ffmpegdec, gboolean force)
{
GstVideoFormat fmt;
GstVideoInfo *in_info, *out_info;
GstVideoCodecState *output_state;
gint fps_n, fps_d;
if (!update_video_context (ffmpegdec, force))
return TRUE;
fmt = gst_ffmpeg_pixfmt_to_videoformat (ffmpegdec->ctx_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->ctx_width, ffmpegdec->ctx_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 */
if (ffmpegdec->ctx_interlaced)
out_info->interlace_mode = GST_VIDEO_INTERLACE_MODE_MIXED;
else
out_info->interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
/* try to find a good framerate */
if (in_info->fps_d) {
/* 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_decoder_negotiate (GST_VIDEO_DECODER (ffmpegdec));
return TRUE;
/* ERRORS */
unknown_format:
{
GST_ERROR_OBJECT (ffmpegdec,
"decoder requires a video format unsupported by GStreamer");
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.
*
* Returns TRUE if the frame should be decoded, FALSE if the frame can be dropped
* entirely.
*/
static gboolean
gst_ffmpegviddec_do_qos (GstFFMpegVidDec * ffmpegdec,
GstVideoCodecFrame * frame, gboolean * mode_switch)
{
GstClockTimeDiff diff;
*mode_switch = FALSE;
if (frame == NULL)
goto no_qos;
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 (!GST_CLOCK_TIME_IS_VALID (diff)))
goto no_qos;
GST_DEBUG_OBJECT (ffmpegdec, "decoding time %" GST_TIME_FORMAT,
GST_TIME_ARGS (diff));
if (diff > 0)
goto normal_mode;
if (diff <= 0) {
goto skip_frame;
}
no_qos:
return TRUE;
normal_mode:
{
if (ffmpegdec->context->skip_frame != AVDISCARD_DEFAULT) {
ffmpegdec->context->skip_frame = AVDISCARD_DEFAULT;
*mode_switch = TRUE;
GST_DEBUG_OBJECT (ffmpegdec, "QOS: normal mode");
}
return TRUE;
}
skip_frame:
{
if (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);
}
return FALSE;
}
}
/* get an outbuf buffer with the current picture */
static GstFlowReturn
get_output_buffer (GstFFMpegVidDec * ffmpegdec, GstVideoCodecFrame * frame)
{
GstFlowReturn ret = GST_FLOW_OK;
AVPicture pic, *outpic;
GstVideoFrame vframe;
GstVideoInfo *info;
gint c;
GST_LOG_OBJECT (ffmpegdec, "get output buffer");
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 alloc_failed;
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);
} else {
pic.data[c] = NULL;
pic.linesize[c] = 0;
}
GST_LOG_OBJECT (ffmpegdec, "linesize %d, data %p", pic.linesize[c],
pic.data[c]);
}
outpic = (AVPicture *) ffmpegdec->picture;
av_picture_copy (&pic, outpic, ffmpegdec->context->pix_fmt,
GST_VIDEO_INFO_WIDTH (info), GST_VIDEO_INFO_HEIGHT (info));
gst_video_frame_unmap (&vframe);
ffmpegdec->picture->reordered_opaque = -1;
return ret;
/* special cases */
alloc_failed:
{
GST_DEBUG_OBJECT (ffmpegdec, "pad_alloc failed");
return ret;
}
}
static void
gst_avpacket_init (AVPacket * packet, guint8 * data, guint size)
{
memset (packet, 0, sizeof (AVPacket));
packet->data = data;
packet->size = size;
}
/* gst_ffmpegviddec_[video|audio]_frame:
* ffmpegdec:
* data: pointer to the data to decode
* size: size of data in bytes
* in_timestamp: incoming timestamp.
* in_duration: incoming duration.
* in_offset: incoming offset (frame number).
* ret: Return flow.
*
* Returns: number of bytes used in decoding. The check for successful decode is
* outbuf being non-NULL.
*/
static gint
gst_ffmpegviddec_video_frame (GstFFMpegVidDec * ffmpegdec,
guint8 * data, guint size, GstVideoCodecFrame * frame, GstFlowReturn * ret)
{
gint len = -1;
gint have_data;
gboolean mode_switch;
gboolean decode;
gint skip_frame = AVDISCARD_DEFAULT;
GstVideoCodecFrame *out_frame;
GstFFMpegVidDecVideoFrame *out_dframe;
AVPacket packet;
*ret = GST_FLOW_OK;
ffmpegdec->context->opaque = ffmpegdec;
/* 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 */
decode = gst_ffmpegviddec_do_qos (ffmpegdec, frame, &mode_switch);
if (ffmpegdec->is_realvideo && data != NULL) {
gint slice_count;
gint i;
/* setup the slice table for realvideo */
if (ffmpegdec->context->slice_offset == NULL)
ffmpegdec->context->slice_offset = g_malloc (sizeof (guint32) * 1000);
slice_count = (*data++) + 1;
ffmpegdec->context->slice_count = slice_count;
for (i = 0; i < slice_count; i++) {
data += 4;
ffmpegdec->context->slice_offset[i] = GST_READ_UINT32_LE (data);
data += 4;
}
}
if (!decode) {
/* no decoding needed, save previous skip_frame value and brutely skip
* decoding everything */
skip_frame = ffmpegdec->context->skip_frame;
ffmpegdec->context->skip_frame = AVDISCARD_NONREF;
}
if (frame) {
/* 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);
}
/* 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);
}
len = avcodec_decode_video2 (ffmpegdec->context,
ffmpegdec->picture, &have_data, &packet);
/* restore previous state */
if (!decode)
ffmpegdec->context->skip_frame = skip_frame;
GST_DEBUG_OBJECT (ffmpegdec, "after decode: len %d, have_data %d",
len, have_data);
/* when we are in skip_frame mode, don't complain when ffmpeg returned
* no data because we told it to skip stuff. */
if (len < 0 && (mode_switch || ffmpegdec->context->skip_frame))
len = 0;
/* no data, we're done */
if (len < 0 || have_data <= 0)
goto beach;
/* get the output picture timing info again */
out_dframe = ffmpegdec->picture->opaque;
out_frame = gst_video_codec_frame_ref (out_dframe->frame);
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: ref %d",
ffmpegdec->picture->reference);
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, "interlaced_frame:%d (current:%d)",
ffmpegdec->picture->interlaced_frame, ffmpegdec->ctx_interlaced);
if (G_UNLIKELY (ffmpegdec->picture->interlaced_frame !=
ffmpegdec->ctx_interlaced)) {
GST_WARNING ("Change in interlacing ! picture:%d, recorded:%d",
ffmpegdec->picture->interlaced_frame, ffmpegdec->ctx_interlaced);
ffmpegdec->ctx_interlaced = ffmpegdec->picture->interlaced_frame;
if (!gst_ffmpegviddec_negotiate (ffmpegdec, TRUE))
goto negotiation_error;
}
if (G_UNLIKELY (out_frame->output_buffer == NULL))
*ret = get_output_buffer (ffmpegdec, out_frame);
if (G_UNLIKELY (*ret != GST_FLOW_OK))
goto no_output;
if (ffmpegdec->ctx_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);
}
*ret =
gst_video_decoder_finish_frame (GST_VIDEO_DECODER (ffmpegdec), out_frame);
beach:
GST_DEBUG_OBJECT (ffmpegdec, "return flow %s, len %d",
gst_flow_get_name (*ret), len);
return len;
/* special cases */
no_output:
{
GST_DEBUG_OBJECT (ffmpegdec, "no output buffer");
gst_video_decoder_drop_frame (GST_VIDEO_DECODER (ffmpegdec), out_frame);
len = -1;
goto beach;
}
negotiation_error:
{
GST_WARNING_OBJECT (ffmpegdec, "Error negotiating format");
*ret = GST_FLOW_NOT_NEGOTIATED;
goto beach;
}
}
/* gst_ffmpegviddec_frame:
* ffmpegdec:
* data: pointer to the data to decode
* size: size of data in bytes
* got_data: 0 if no data was decoded, != 0 otherwise.
* in_time: timestamp of data
* in_duration: duration of data
* ret: GstFlowReturn to return in the chain function
*
* Decode the given frame and pushes it downstream.
*
* Returns: Number of bytes used in decoding, -1 on error/failure.
*/
static gint
gst_ffmpegviddec_frame (GstFFMpegVidDec * ffmpegdec,
guint8 * data, guint size, gint * got_data, GstVideoCodecFrame * frame,
GstFlowReturn * ret)
{
GstFFMpegVidDecClass *oclass;
gint have_data = 0, len = 0;
if (G_UNLIKELY (ffmpegdec->context->codec == NULL))
goto no_codec;
GST_LOG_OBJECT (ffmpegdec, "data:%p, size:%d", data, size);
*ret = GST_FLOW_OK;
ffmpegdec->context->frame_number++;
oclass = (GstFFMpegVidDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
len = gst_ffmpegviddec_video_frame (ffmpegdec, data, size, frame, ret);
if (frame && frame->output_buffer)
have_data = 1;
if (len < 0 || have_data < 0) {
GST_WARNING_OBJECT (ffmpegdec,
"avdec_%s: decoding error (len: %d, have_data: %d)",
oclass->in_plugin->name, len, have_data);
*got_data = 0;
goto beach;
}
if (len == 0 && have_data == 0) {
*got_data = 0;
goto beach;
}
/* this is where I lost my last clue on ffmpeg... */
*got_data = 1;
beach:
return len;
/* ERRORS */
no_codec:
{
GST_ERROR_OBJECT (ffmpegdec, "no codec context");
*ret = GST_FLOW_NOT_NEGOTIATED;
return -1;
}
}
static void
gst_ffmpegviddec_drain (GstFFMpegVidDec * ffmpegdec)
{
GstFFMpegVidDecClass *oclass;
oclass = (GstFFMpegVidDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
if (oclass->in_plugin->capabilities & CODEC_CAP_DELAY) {
gint have_data, len, try = 0;
GST_LOG_OBJECT (ffmpegdec,
"codec has delay capabilities, calling until ffmpeg has drained everything");
do {
GstFlowReturn ret;
len = gst_ffmpegviddec_frame (ffmpegdec, NULL, 0, &have_data, NULL, &ret);
if (len < 0 || have_data == 0)
break;
} while (try++ < 10);
}
}
static GstFlowReturn
gst_ffmpegviddec_handle_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame)
{
GstFFMpegVidDec *ffmpegdec = (GstFFMpegVidDec *) decoder;
guint8 *data, *bdata;
gint size, len, have_data, bsize;
GstMapInfo minfo;
GstFlowReturn ret = GST_FLOW_OK;
gboolean do_padding;
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_ERROR_OBJECT (ffmpegdec, "Failed to map buffer");
return GST_FLOW_ERROR;
}
bdata = minfo.data;
bsize = minfo.size;
if (bsize > 0 && (!GST_MEMORY_IS_ZERO_PADDED (minfo.memory)
|| (minfo.maxsize - minfo.size) < FF_INPUT_BUFFER_PADDING_SIZE)) {
/* add padding */
if (ffmpegdec->padded_size < bsize + FF_INPUT_BUFFER_PADDING_SIZE) {
ffmpegdec->padded_size = bsize + FF_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, bdata, bsize);
memset (ffmpegdec->padded + bsize, 0, FF_INPUT_BUFFER_PADDING_SIZE);
bdata = ffmpegdec->padded;
do_padding = TRUE;
} else {
do_padding = FALSE;
}
do {
guint8 tmp_padding[FF_INPUT_BUFFER_PADDING_SIZE];
/* parse, if at all possible */
data = bdata;
size = bsize;
if (do_padding) {
/* add temporary padding */
GST_CAT_TRACE_OBJECT (GST_CAT_PERFORMANCE, ffmpegdec,
"Add temporary input padding");
memcpy (tmp_padding, data + size, FF_INPUT_BUFFER_PADDING_SIZE);
memset (data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
}
/* decode a frame of audio/video now */
len =
gst_ffmpegviddec_frame (ffmpegdec, data, size, &have_data, frame, &ret);
if (do_padding) {
memcpy (data + size, tmp_padding, FF_INPUT_BUFFER_PADDING_SIZE);
}
if (ret != GST_FLOW_OK) {
GST_LOG_OBJECT (ffmpegdec, "breaking because of flow ret %s",
gst_flow_get_name (ret));
/* bad flow retun, make sure we discard all data and exit */
bsize = 0;
break;
}
if (len == 0 && !have_data) {
/* nothing was decoded, this could be because no data was available or
* because we were skipping frames.
* If we have no context we must exit and wait for more data, we keep the
* data we tried. */
GST_LOG_OBJECT (ffmpegdec, "Decoding didn't return any data, breaking");
break;
}
if (len < 0) {
/* a decoding error happened, we must break and try again with next data. */
GST_LOG_OBJECT (ffmpegdec, "Decoding error, breaking");
bsize = 0;
break;
}
/* prepare for the next round, for codecs with a context we did this
* already when using the parser. */
bsize -= len;
bdata += len;
do_padding = TRUE;
GST_LOG_OBJECT (ffmpegdec, "Before (while bsize>0). bsize:%d , bdata:%p",
bsize, bdata);
} while (bsize > 0);
if (bsize > 0)
GST_DEBUG_OBJECT (ffmpegdec, "Dropping %d bytes of data", bsize);
gst_buffer_unmap (frame->input_buffer, &minfo);
gst_video_codec_frame_unref (frame);
return ret;
}
static gboolean
gst_ffmpegviddec_stop (GstVideoDecoder * decoder)
{
GstFFMpegVidDec *ffmpegdec = (GstFFMpegVidDec *) decoder;
GST_OBJECT_LOCK (ffmpegdec);
gst_ffmpegviddec_close (ffmpegdec);
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;
return TRUE;
}
static GstFlowReturn
gst_ffmpegviddec_finish (GstVideoDecoder * decoder)
{
GstFFMpegVidDec *ffmpegdec = (GstFFMpegVidDec *) decoder;
gst_ffmpegviddec_drain (ffmpegdec);
return GST_FLOW_OK;
}
static gboolean
gst_ffmpegviddec_reset (GstVideoDecoder * decoder, gboolean hard)
{
GstFFMpegVidDec *ffmpegdec = (GstFFMpegVidDec *) decoder;
if (ffmpegdec->opened) {
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_videometa, have_alignment;
GstAllocator *allocator = NULL;
GstAllocationParams params = { 0, 15, 0, 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, 15);
} else {
gst_query_add_allocation_param (query, allocator, &params);
}
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, state->caps, size, min, max);
/* we are happy with the default allocator but we would like to have 16 bytes
* aligned and padded memory */
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);
/* we can only enable the alignment if downstream supports the
* videometa api */
if (have_alignment && have_videometa) {
GstVideoAlignment align;
gint width, height;
gint linesize_align[4];
gint i;
guint edge;
width = GST_VIDEO_INFO_WIDTH (&state->info);
height = GST_VIDEO_INFO_HEIGHT (&state->info);
/* let ffmpeg find the alignment and padding */
avcodec_align_dimensions2 (ffmpegdec->context, &width, &height,
linesize_align);
edge =
ffmpegdec->
context->flags & CODEC_FLAG_EMU_EDGE ? 0 : avcodec_get_edge_width ();
/* increase the size for the padding */
width += edge << 1;
height += edge << 1;
align.padding_top = edge;
align.padding_left = edge;
align.padding_right = width - GST_VIDEO_INFO_WIDTH (&state->info) - edge;
align.padding_bottom = height - GST_VIDEO_INFO_HEIGHT (&state->info) - edge;
/* add extra padding to match libav buffer allocation sizes */
align.padding_bottom++;
for (i = 0; i < GST_VIDEO_MAX_PLANES; i++)
align.stride_align[i] =
(linesize_align[i] > 0 ? linesize_align[i] - 1 : 0);
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 (&state->info),
GST_VIDEO_INFO_HEIGHT (&state->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);
if (ffmpegdec->direct_rendering) {
GstFFMpegVidDecClass *oclass;
GST_DEBUG_OBJECT (ffmpegdec, "trying to enable direct rendering");
oclass = (GstFFMpegVidDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec));
if (oclass->in_plugin->capabilities & CODEC_CAP_DR1) {
GST_DEBUG_OBJECT (ffmpegdec, "enabled direct rendering");
ffmpegdec->current_dr = TRUE;
} else {
GST_DEBUG_OBJECT (ffmpegdec, "direct rendering not supported");
}
}
} else {
GST_DEBUG_OBJECT (ffmpegdec,
"alignment or videometa not supported, disable direct rendering");
/* disable direct rendering. This will make us use the fallback ffmpeg
* picture allocation code with padding etc. We will then do the final
* copy (with cropping) into a buffer from our pool */
ffmpegdec->current_dr = FALSE;
}
/* and store */
gst_buffer_pool_set_config (pool, config);
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 = 15;
params.padding = FF_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;
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;
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;
in_plugin = av_codec_next (NULL);
GST_LOG ("Registering decoders");
while (in_plugin) {
gchar *type_name;
gchar *plugin_name;
/* only video decoders */
if (!av_codec_is_decoder (in_plugin)
|| in_plugin->type != AVMEDIA_TYPE_VIDEO)
goto next;
/* 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_R210 ||
(in_plugin->id >= AV_CODEC_ID_PCM_S16LE &&
in_plugin->id <= AV_CODEC_ID_PCM_BLURAY)) {
goto next;
}
/* 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);
goto next;
}
/* 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);
goto next;
}
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);
goto next;
}
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 */
if (!strcmp (in_plugin->name, "gif") ||
!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")) {
GST_LOG ("Ignoring decoder %s", in_plugin->name);
goto next;
}
/* construct the type */
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_MPEG4:
case AV_CODEC_ID_MSMPEG4V3:
case AV_CODEC_ID_H264:
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);
next:
in_plugin = av_codec_next (in_plugin);
}
GST_LOG ("Finished Registering decoders");
return TRUE;
}
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