/* GStreamer * Copyright (C) <1999> Erik Walthinsen * * 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 #include #include #include #include #include #include #include #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 #define DEFAULT_OUTPUT_CORRUPT TRUE #define REQUIRED_POOL_MAX_BUFFERS 32 enum { PROP_0, PROP_LOWRES, PROP_SKIPFRAME, PROP_DIRECT_RENDERING, PROP_DEBUG_MV, PROP_MAX_THREADS, PROP_OUTPUT_CORRUPT, 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, gboolean force); /* 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 void gst_ffmpegviddec_drain (GstFFMpegVidDec * ffmpegdec); 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 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 , " "Ronald Bultje , " "Edward Hervey "); 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)); 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 & (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->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_finish; /* drain and finish are the same to us */ 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->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; 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; gint 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; ffmpegdec->current_dr = FALSE; gst_buffer_replace (&ffmpegdec->palette, NULL); if (ffmpegdec->context->extradata) { av_free (ffmpegdec->context->extradata); ffmpegdec->context->extradata = NULL; } if (ffmpegdec->context->slice_offset) { g_free (ffmpegdec->context->slice_offset); ffmpegdec->context->slice_offset = 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; gint 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; 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; } gst_ffmpegviddec_context_set_flags (ffmpegdec->context, 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_drain (ffmpegdec); 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->ctx_ticks = 0; ffmpegdec->ctx_time_n = 0; ffmpegdec->ctx_time_d = 0; } gst_caps_replace (&ffmpegdec->last_caps, state->caps); /* set buffer functions */ ffmpegdec->context->get_buffer2 = gst_ffmpegviddec_get_buffer2; ffmpegdec->context->get_buffer = NULL; ffmpegdec->context->reget_buffer = NULL; ffmpegdec->context->release_buffer = NULL; 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 { 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); } /* 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; 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 */ 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 the picture format changed but we already negotiated before, * we will have to do fallback allocation until output and input * formats are in sync again. We will renegotiate on the output * We use the info from the context which correspond to the input format, * the info from the picture correspond to memory requires, not to the actual * image size. */ if (ffmpegdec->pic_width != 0 && !(ffmpegdec->pic_width == context->width && ffmpegdec->pic_height == context->height && ffmpegdec->pic_pix_fmt == picture->format)) goto fallback; 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; /* 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 */ info = &ffmpegdec->output_state->info; if (!gst_video_frame_map (&dframe->vframe, info, dframe->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); /* libav does not allow stride changes currently, fall back to * non-direct rendering here: * https://bugzilla.gnome.org/show_bug.cgi?id=704769 * https://bugzilla.libav.org/show_bug.cgi?id=556 */ if (ffmpegdec->stride[c] == -1) { ffmpegdec->stride[c] = picture->linesize[c]; } else if (picture->linesize[c] != ffmpegdec->stride[c]) { GST_LOG_OBJECT (ffmpegdec, "No direct rendering, stride changed c=%d %d->%d", c, ffmpegdec->stride[c], picture->linesize[c]); for (c = 0; c < AV_NUM_DATA_POINTERS; c++) { picture->data[c] = NULL; picture->linesize[c] = 0; av_buffer_unref (&picture->buf[c]); } gst_video_frame_unmap (&dframe->vframe); dframe->mapped = FALSE; gst_buffer_replace (&dframe->buffer, NULL); ffmpegdec->current_dr = FALSE; goto no_dr; } } else { picture->data[c] = NULL; picture->linesize[c] = 0; } GST_LOG_OBJECT (ffmpegdec, "linesize %d, data %p", picture->linesize[c], picture->data[c]); } picture->buf[0] = av_buffer_create (NULL, 0, dummy_free_buffer, dframe, 0); /* 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", dframe->buffer); return 0; /* fallbacks */ 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_replace (&dframe->buffer, NULL); goto fallback; } fallback: { int c; int ret = avcodec_default_get_buffer2 (context, picture, flags); 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; } 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) { 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); } 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, gboolean force) { if (!force && !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->pic_interlaced = picture->interlaced_frame; 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 gboolean gst_ffmpegviddec_negotiate (GstFFMpegVidDec * ffmpegdec, AVCodecContext * context, AVFrame * picture, gboolean force) { GstVideoFormat fmt; GstVideoInfo *in_info, *out_info; GstVideoCodecState *output_state; gint fps_n, fps_d; if (!update_video_context (ffmpegdec, context, picture, force)) 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 */ if (ffmpegdec->pic_interlaced) out_info->interlace_mode = GST_VIDEO_INTERLACE_MODE_MIXED; else out_info->interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE; switch (context->chroma_sample_location) { case 1: out_info->chroma_site = GST_VIDEO_CHROMA_SITE_MPEG2; break; case 2: out_info->chroma_site = GST_VIDEO_CHROMA_SITE_JPEG; break; case 3: out_info->chroma_site = GST_VIDEO_CHROMA_SITE_DV; break; case 4: out_info->chroma_site = GST_VIDEO_CHROMA_SITE_V_COSITED; break; default: break; } /* 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); /* Copy stereo/multiview info from upstream if set */ if (GST_VIDEO_INFO_MULTIVIEW_MODE (in_info) != GST_VIDEO_MULTIVIEW_MODE_NONE) { GST_VIDEO_INFO_MULTIVIEW_MODE (out_info) = GST_VIDEO_INFO_MULTIVIEW_MODE (in_info); GST_VIDEO_INFO_MULTIVIEW_FLAGS (out_info) = GST_VIDEO_INFO_MULTIVIEW_FLAGS (in_info); } if (!gst_video_decoder_negotiate (GST_VIDEO_DECODER (ffmpegdec))) goto negotiate_failed; 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->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; } 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)) return; GST_DEBUG_OBJECT (ffmpegdec, "decoding time %" G_GINT64_FORMAT, diff); if (*mode_switch == FALSE) { 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; AVPicture pic, *outpic; GstVideoFrame vframe; GstVideoInfo *info; gint 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 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, "allocation failed"); 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; } /* 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, gint * have_data, GstVideoCodecFrame * frame, GstFlowReturn * ret) { gint len = -1; gboolean mode_switch; GstVideoCodecFrame *out_frame; GstFFMpegVidDecVideoFrame *out_dframe; AVPacket packet; *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); 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 (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); } /* 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); len = avcodec_decode_video2 (ffmpegdec->context, ffmpegdec->picture, have_data, &packet); GST_VIDEO_DECODER_STREAM_LOCK (ffmpegdec); 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); /* 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); 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, "corrupted frame: %d", ! !(ffmpegdec->picture->flags & AV_FRAME_FLAG_CORRUPT)); if (!gst_ffmpegviddec_negotiate (ffmpegdec, ffmpegdec->context, ffmpegdec->picture, FALSE)) 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; /* 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); } /* 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, 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: { 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; } } /* 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 * have_data, GstVideoCodecFrame * frame, GstFlowReturn * ret) { GstFFMpegVidDecClass *oclass; gint 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, have_data, frame, ret); if (len < 0) { GST_WARNING_OBJECT (ffmpegdec, "avdec_%s: decoding error (len: %d, have_data: %d)", oclass->in_plugin->name, len, *have_data); } 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; if (!ffmpegdec->opened) return; oclass = (GstFFMpegVidDecClass *) (G_OBJECT_GET_CLASS (ffmpegdec)); if (oclass->in_plugin->capabilities & CODEC_CAP_DELAY) { gint have_data, len; GstFlowReturn ret; GST_LOG_OBJECT (ffmpegdec, "codec has delay capabilities, calling until ffmpeg has drained everything"); do { len = gst_ffmpegviddec_frame (ffmpegdec, NULL, 0, &have_data, NULL, &ret); } while (len >= 0 && have_data == 1 && ret == GST_FLOW_OK); avcodec_flush_buffers (ffmpegdec->context); } } 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_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); 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 (ret != GST_FLOW_OK) { GST_LOG_OBJECT (ffmpegdec, "breaking because of flow ret %s", gst_flow_get_name (ret)); /* bad flow return, make sure we discard all data and exit */ bsize = 0; break; } if (do_padding) { memcpy (data + size, tmp_padding, FF_INPUT_BUFFER_PADDING_SIZE); } if (len == 0 && have_data == 0) { /* 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_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; ffmpegdec->pic_pix_fmt = 0; ffmpegdec->pic_width = 0; ffmpegdec->pic_height = 0; ffmpegdec->pic_par_n = 0; ffmpegdec->pic_par_d = 0; ffmpegdec->ctx_ticks = 0; ffmpegdec->ctx_time_n = 0; ffmpegdec->ctx_time_d = 0; 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_flush (GstVideoDecoder * decoder) { 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, update_pool = FALSE; 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, ¶ms); params.align = MAX (params.align, 15); } else { gst_query_add_allocation_param (query, allocator, ¶ms); } 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; /* 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); /* 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, ¶ms); 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); /* Most cases don't do direct rendering */ ffmpegdec->current_dr = FALSE; /* 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 */ } /* and store */ gst_buffer_pool_set_config (pool, config); 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 (¶ms); 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, ¶ms); 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; 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; 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 */ 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_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); next: in_plugin = av_codec_next (in_plugin); } GST_LOG ("Finished Registering decoders"); return TRUE; }