gboolean gst_base_video_decoder_set_src_caps (GstBaseVideoDecoder * base_video_decoder) { GstCaps *caps; GstVideoState *state = &base_video_decoder->state; if (base_video_decoder->have_src_caps) return TRUE; caps = gst_pad_get_allowed_caps (base_video_decoder->srcpad); if (!caps) goto null_allowed_caps; if (gst_caps_is_empty (caps)) goto empty_allowed_caps; gst_caps_set_simple (caps, "width", G_TYPE_INT, state->width, "height", G_TYPE_INT, state->height, "pixel-aspect-ratio", GST_TYPE_FRACTION, state->par_n, state->par_d, "interlaced", G_TYPE_BOOLEAN, state->interlaced, NULL); if (state->fps_d != 0) gst_caps_set_simple (caps, "framerate", GST_TYPE_FRACTION, state->fps_n, state->fps_d, NULL); gst_pad_fixate_caps (base_video_decoder->srcpad, caps); GST_DEBUG ("setting caps %" GST_PTR_FORMAT, caps); base_video_decoder->have_src_caps = gst_pad_set_caps (GST_BASE_VIDEO_DECODER_SRC_PAD (base_video_decoder), caps); gst_caps_unref (caps); return base_video_decoder->have_src_caps; null_allowed_caps: GST_ERROR_OBJECT (base_video_decoder, "Got null from gst_pad_get_allowed_caps"); return FALSE; empty_allowed_caps: GST_ERROR_OBJECT (base_video_decoder, "Got EMPTY caps from gst_pad_get_allowed_caps"); gst_caps_unref (caps); return FALSE; }
GstFlowReturn gst_base_video_decoder_finish_frame (GstBaseVideoDecoder * base_video_decoder, GstVideoFrame * frame) { GstBaseVideoDecoderClass *base_video_decoder_class; GstBuffer *src_buffer; GST_DEBUG ("finish frame"); base_video_decoder_class = GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder); GST_DEBUG ("finish frame sync=%d pts=%" GST_TIME_FORMAT, GST_VIDEO_FRAME_FLAG_IS_SET (frame, GST_VIDEO_FRAME_FLAG_SYNC_POINT), GST_TIME_ARGS (frame->presentation_timestamp)); if (GST_CLOCK_TIME_IS_VALID (frame->presentation_timestamp)) { if (frame->presentation_timestamp != base_video_decoder->timestamp_offset) { GST_DEBUG ("sync timestamp %" GST_TIME_FORMAT " diff %" GST_TIME_FORMAT, GST_TIME_ARGS (frame->presentation_timestamp), GST_TIME_ARGS (frame->presentation_timestamp - base_video_decoder->segment.start)); base_video_decoder->timestamp_offset = frame->presentation_timestamp; base_video_decoder->field_index = 0; } else { /* This case is for one initial timestamp and no others, e.g., * filesrc ! decoder ! xvimagesink */ GST_WARNING ("sync timestamp didn't change, ignoring"); frame->presentation_timestamp = GST_CLOCK_TIME_NONE; } } else { if (GST_VIDEO_FRAME_FLAG_IS_SET (frame, GST_VIDEO_FRAME_FLAG_SYNC_POINT)) { GST_WARNING ("sync point doesn't have timestamp"); if (!GST_CLOCK_TIME_IS_VALID (base_video_decoder->timestamp_offset)) { GST_WARNING ("No base timestamp. Assuming frames start at segment start"); base_video_decoder->timestamp_offset = base_video_decoder->segment.start; base_video_decoder->field_index = 0; } } } frame->field_index = base_video_decoder->field_index; base_video_decoder->field_index += frame->n_fields; if (frame->presentation_timestamp == GST_CLOCK_TIME_NONE) { frame->presentation_timestamp = gst_base_video_decoder_get_field_timestamp (base_video_decoder, frame->field_index); frame->presentation_duration = GST_CLOCK_TIME_NONE; frame->decode_timestamp = gst_base_video_decoder_get_timestamp (base_video_decoder, frame->decode_frame_number); } if (frame->presentation_duration == GST_CLOCK_TIME_NONE) { frame->presentation_duration = gst_base_video_decoder_get_field_duration (base_video_decoder, frame->n_fields); } if (GST_CLOCK_TIME_IS_VALID (base_video_decoder->last_timestamp)) { if (frame->presentation_timestamp < base_video_decoder->last_timestamp) { GST_WARNING ("decreasing timestamp (%" GST_TIME_FORMAT " < %" GST_TIME_FORMAT ")", GST_TIME_ARGS (frame->presentation_timestamp), GST_TIME_ARGS (base_video_decoder->last_timestamp)); } } base_video_decoder->last_timestamp = frame->presentation_timestamp; src_buffer = frame->src_buffer; GST_BUFFER_FLAG_UNSET (src_buffer, GST_BUFFER_FLAG_DELTA_UNIT); if (base_video_decoder->state.interlaced) { #ifndef GST_VIDEO_BUFFER_TFF #define GST_VIDEO_BUFFER_TFF (GST_MINI_OBJECT_FLAG_LAST << 5) #endif #ifndef GST_VIDEO_BUFFER_RFF #define GST_VIDEO_BUFFER_RFF (GST_MINI_OBJECT_FLAG_LAST << 6) #endif #ifndef GST_VIDEO_BUFFER_ONEFIELD #define GST_VIDEO_BUFFER_ONEFIELD (GST_MINI_OBJECT_FLAG_LAST << 7) #endif if (GST_VIDEO_FRAME_FLAG_IS_SET (frame, GST_VIDEO_FRAME_FLAG_TFF)) { GST_BUFFER_FLAG_SET (src_buffer, GST_VIDEO_BUFFER_TFF); } else { GST_BUFFER_FLAG_UNSET (src_buffer, GST_VIDEO_BUFFER_TFF); } GST_BUFFER_FLAG_UNSET (src_buffer, GST_VIDEO_BUFFER_RFF); GST_BUFFER_FLAG_UNSET (src_buffer, GST_VIDEO_BUFFER_ONEFIELD); if (frame->n_fields == 3) { GST_BUFFER_FLAG_SET (src_buffer, GST_VIDEO_BUFFER_RFF); } else if (frame->n_fields == 1) { GST_BUFFER_FLAG_SET (src_buffer, GST_VIDEO_BUFFER_ONEFIELD); } } if (base_video_decoder->discont) { GST_BUFFER_FLAG_UNSET (src_buffer, GST_BUFFER_FLAG_DISCONT); base_video_decoder->discont = FALSE; } GST_BUFFER_TIMESTAMP (src_buffer) = frame->presentation_timestamp; GST_BUFFER_DURATION (src_buffer) = frame->presentation_duration; GST_BUFFER_OFFSET (src_buffer) = GST_BUFFER_OFFSET_NONE; GST_BUFFER_OFFSET_END (src_buffer) = GST_BUFFER_OFFSET_NONE; GST_DEBUG ("pushing frame %" GST_TIME_FORMAT, GST_TIME_ARGS (frame->presentation_timestamp)); gst_base_video_decoder_set_src_caps (base_video_decoder); if (base_video_decoder->sink_clipping) { gint64 start = GST_BUFFER_TIMESTAMP (src_buffer); gint64 stop = GST_BUFFER_TIMESTAMP (src_buffer) + GST_BUFFER_DURATION (src_buffer); if (gst_segment_clip (&base_video_decoder->segment, GST_FORMAT_TIME, start, stop, &start, &stop)) { GST_BUFFER_TIMESTAMP (src_buffer) = start; GST_BUFFER_DURATION (src_buffer) = stop - start; GST_DEBUG ("accepting buffer inside segment: %" GST_TIME_FORMAT " %" GST_TIME_FORMAT " seg %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT " time %" GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer)), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer) + GST_BUFFER_DURATION (src_buffer)), GST_TIME_ARGS (base_video_decoder->segment.start), GST_TIME_ARGS (base_video_decoder->segment.stop), GST_TIME_ARGS (base_video_decoder->segment.time)); } else { GST_DEBUG ("dropping buffer outside segment: %" GST_TIME_FORMAT " %" GST_TIME_FORMAT " seg %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT " time %" GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer)), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer) + GST_BUFFER_DURATION (src_buffer)), GST_TIME_ARGS (base_video_decoder->segment.start), GST_TIME_ARGS (base_video_decoder->segment.stop), GST_TIME_ARGS (base_video_decoder->segment.time)); gst_video_frame_unref (frame); return GST_FLOW_OK; } } gst_buffer_ref (src_buffer); gst_video_frame_unref (frame); if (base_video_decoder_class->shape_output) return base_video_decoder_class->shape_output (base_video_decoder, src_buffer); return gst_pad_push (GST_BASE_VIDEO_DECODER_SRC_PAD (base_video_decoder), src_buffer); }
static GstFlowReturn gst_base_video_decoder_chain (GstPad * pad, GstBuffer * buf) { GstBaseVideoDecoder *base_video_decoder; GstBaseVideoDecoderClass *base_video_decoder_class; GstFlowReturn ret; GST_DEBUG ("chain %" GST_TIME_FORMAT " duration %" GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_TIME_ARGS (GST_BUFFER_DURATION (buf))); #if 0 /* requiring the pad to be negotiated makes it impossible to use * oggdemux or filesrc ! decoder */ if (!gst_pad_is_negotiated (pad)) { GST_DEBUG ("not negotiated"); return GST_FLOW_NOT_NEGOTIATED; } #endif base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad)); base_video_decoder_class = GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder); GST_DEBUG_OBJECT (base_video_decoder, "chain"); if (!base_video_decoder->have_segment) { GstEvent *event; GstFlowReturn ret; GST_WARNING ("Received buffer without a new-segment. Assuming timestamps start from 0."); gst_segment_set_newsegment_full (&base_video_decoder->segment, FALSE, 1.0, 1.0, GST_FORMAT_TIME, 0, GST_CLOCK_TIME_NONE, 0); base_video_decoder->have_segment = TRUE; event = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME, 0, GST_CLOCK_TIME_NONE, 0); ret = gst_pad_push_event (GST_BASE_VIDEO_DECODER_SRC_PAD (base_video_decoder), event); if (!ret) { GST_ERROR ("new segment event ret=%d", ret); return GST_FLOW_ERROR; } } if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DISCONT))) { GST_DEBUG_OBJECT (base_video_decoder, "received DISCONT buffer"); gst_base_video_decoder_flush (base_video_decoder); } if (base_video_decoder->current_frame == NULL) { base_video_decoder->current_frame = gst_base_video_decoder_new_frame (base_video_decoder); } base_video_decoder->input_offset += GST_BUFFER_SIZE (buf); if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) { gst_base_video_decoder_add_timestamp (base_video_decoder, buf); } if (base_video_decoder->packetized) { base_video_decoder->current_frame->sink_buffer = buf; ret = gst_base_video_decoder_have_frame (base_video_decoder, TRUE, NULL); } else { gst_adapter_push (base_video_decoder->input_adapter, buf); ret = gst_base_video_decoder_drain (base_video_decoder, FALSE); } gst_object_unref (base_video_decoder); return ret; }
static gboolean gst_base_video_decoder_sink_event (GstPad * pad, GstEvent * event) { GstBaseVideoDecoder *base_video_decoder; GstBaseVideoDecoderClass *base_video_decoder_class; gboolean ret = FALSE; base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad)); base_video_decoder_class = GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_EOS: { if (!base_video_decoder->packetized) gst_base_video_decoder_drain (base_video_decoder, TRUE); ret = gst_pad_push_event (GST_BASE_VIDEO_DECODER_SRC_PAD (base_video_decoder), event); } break; case GST_EVENT_NEWSEGMENT: { gboolean update; double rate; double applied_rate; GstFormat format; gint64 start; gint64 stop; gint64 position; GstSegment *segment = &base_video_decoder->segment; gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate, &format, &start, &stop, &position); if (format != GST_FORMAT_TIME) goto newseg_wrong_format; if (!update) { gst_base_video_decoder_flush (base_video_decoder); } base_video_decoder->timestamp_offset = start; gst_segment_set_newsegment_full (segment, update, rate, applied_rate, format, start, stop, position); base_video_decoder->have_segment = TRUE; GST_WARNING ("new segment: format %d rate %g start %" GST_TIME_FORMAT " stop %" GST_TIME_FORMAT " position %" GST_TIME_FORMAT " update %d", format, rate, GST_TIME_ARGS (segment->start), GST_TIME_ARGS (segment->stop), GST_TIME_ARGS (segment->time), update); ret = gst_pad_push_event (GST_BASE_VIDEO_DECODER_SRC_PAD (base_video_decoder), event); } break; case GST_EVENT_FLUSH_STOP: gst_base_video_decoder_flush (base_video_decoder); gst_segment_init (&base_video_decoder->segment, GST_FORMAT_TIME); ret = gst_pad_push_event (GST_BASE_VIDEO_DECODER_SRC_PAD (base_video_decoder), event); break; default: /* FIXME this changes the order of events */ ret = gst_pad_push_event (GST_BASE_VIDEO_DECODER_SRC_PAD (base_video_decoder), event); break; } done: gst_object_unref (base_video_decoder); return ret; newseg_wrong_format: { GST_DEBUG_OBJECT (base_video_decoder, "received non TIME newsegment"); gst_event_unref (event); goto done; } }
GstFlowReturn gst_base_video_decoder_finish_frame (GstBaseVideoDecoder * base_video_decoder, GstVideoFrame * frame) { GstBaseVideoDecoderClass *base_video_decoder_class; GstClockTime presentation_timestamp; GstClockTime presentation_duration; GstBuffer *src_buffer; GST_DEBUG ("finish frame"); base_video_decoder_class = GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder); gst_base_video_decoder_calculate_timestamps (base_video_decoder, frame, &presentation_timestamp, &presentation_duration); src_buffer = frame->src_buffer; GST_BUFFER_FLAG_UNSET (src_buffer, GST_BUFFER_FLAG_DELTA_UNIT); if (base_video_decoder->state.interlaced) { #ifndef GST_VIDEO_BUFFER_TFF #define GST_VIDEO_BUFFER_TFF (GST_MINI_OBJECT_FLAG_LAST << 5) #endif #ifndef GST_VIDEO_BUFFER_RFF #define GST_VIDEO_BUFFER_RFF (GST_MINI_OBJECT_FLAG_LAST << 6) #endif #ifndef GST_VIDEO_BUFFER_ONEFIELD #define GST_VIDEO_BUFFER_ONEFIELD (GST_MINI_OBJECT_FLAG_LAST << 7) #endif if (GST_VIDEO_FRAME_FLAG_IS_SET (frame, GST_VIDEO_FRAME_FLAG_TFF)) { GST_BUFFER_FLAG_SET (src_buffer, GST_VIDEO_BUFFER_TFF); } else { GST_BUFFER_FLAG_UNSET (src_buffer, GST_VIDEO_BUFFER_TFF); } GST_BUFFER_FLAG_UNSET (src_buffer, GST_VIDEO_BUFFER_RFF); GST_BUFFER_FLAG_UNSET (src_buffer, GST_VIDEO_BUFFER_ONEFIELD); if (frame->n_fields == 3) { GST_BUFFER_FLAG_SET (src_buffer, GST_VIDEO_BUFFER_RFF); } else if (frame->n_fields == 1) { GST_BUFFER_FLAG_SET (src_buffer, GST_VIDEO_BUFFER_ONEFIELD); } } if (base_video_decoder->discont) { GST_BUFFER_FLAG_UNSET (src_buffer, GST_BUFFER_FLAG_DISCONT); base_video_decoder->discont = FALSE; } GST_BUFFER_TIMESTAMP (src_buffer) = presentation_timestamp; GST_BUFFER_DURATION (src_buffer) = presentation_duration; GST_BUFFER_OFFSET (src_buffer) = GST_BUFFER_OFFSET_NONE; GST_BUFFER_OFFSET_END (src_buffer) = GST_BUFFER_OFFSET_NONE; GST_DEBUG ("pushing frame %" GST_TIME_FORMAT, GST_TIME_ARGS (presentation_timestamp)); gst_base_video_decoder_set_src_caps (base_video_decoder); if (base_video_decoder->sink_clipping) { gint64 start = GST_BUFFER_TIMESTAMP (src_buffer); gint64 stop = GST_BUFFER_TIMESTAMP (src_buffer) + GST_BUFFER_DURATION (src_buffer); if (gst_segment_clip (&base_video_decoder->segment, GST_FORMAT_TIME, start, stop, &start, &stop)) { GST_BUFFER_TIMESTAMP (src_buffer) = start; GST_BUFFER_DURATION (src_buffer) = stop - start; GST_DEBUG ("accepting buffer inside segment: %" GST_TIME_FORMAT " %" GST_TIME_FORMAT " seg %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT " time %" GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer)), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer) + GST_BUFFER_DURATION (src_buffer)), GST_TIME_ARGS (base_video_decoder->segment.start), GST_TIME_ARGS (base_video_decoder->segment.stop), GST_TIME_ARGS (base_video_decoder->segment.time)); } else { GST_DEBUG ("dropping buffer outside segment: %" GST_TIME_FORMAT " %" GST_TIME_FORMAT " seg %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT " time %" GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer)), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer) + GST_BUFFER_DURATION (src_buffer)), GST_TIME_ARGS (base_video_decoder->segment.start), GST_TIME_ARGS (base_video_decoder->segment.stop), GST_TIME_ARGS (base_video_decoder->segment.time)); gst_video_frame_unref (frame); return GST_FLOW_OK; } } gst_buffer_ref (src_buffer); gst_video_frame_unref (frame); if (base_video_decoder_class->shape_output) return base_video_decoder_class->shape_output (base_video_decoder, src_buffer); return gst_pad_push (GST_BASE_VIDEO_DECODER_SRC_PAD (base_video_decoder), src_buffer); }