/* GStreamer * Copyright (C) 2008 David Schleef <ds@schleef.org> * * 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "gstbasevideodecoder.h" #include <string.h> GST_DEBUG_CATEGORY (basevideodecoder_debug); #define GST_CAT_DEFAULT basevideodecoder_debug enum { PROP_0, PROP_PACKETIZED, PROP_SINK_CLIPPING }; static GstFlowReturn gst_base_video_decoder_drain (GstBaseVideoDecoder * dec, gboolean at_eos); GST_BOILERPLATE (GstBaseVideoDecoder, gst_base_video_decoder, GstElement, GST_TYPE_ELEMENT); typedef struct _Timestamp Timestamp; struct _Timestamp { guint64 offset; GstClockTime timestamp; GstClockTime duration; }; static void gst_base_video_decoder_clear_timestamps (GstBaseVideoDecoder * base_video_decoder) { GList *l; for (l = base_video_decoder->timestamps; l; l = base_video_decoder->timestamps) { g_slice_free (Timestamp, l->data); base_video_decoder->timestamps = l->next; g_list_free1 (l); } } static void gst_base_video_decoder_add_timestamp (GstBaseVideoDecoder * base_video_decoder, GstBuffer * buffer) { Timestamp *ts; ts = g_slice_new (Timestamp); GST_DEBUG ("adding timestamp %" G_GUINT64_FORMAT " %" GST_TIME_FORMAT, base_video_decoder->input_offset, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer))); ts->offset = base_video_decoder->input_offset; ts->timestamp = GST_BUFFER_TIMESTAMP (buffer); ts->duration = GST_BUFFER_DURATION (buffer); base_video_decoder->timestamps = g_list_append (base_video_decoder->timestamps, ts); } static void gst_base_video_decoder_get_timestamp_at_offset (GstBaseVideoDecoder * base_video_decoder, guint64 offset, GstClockTime * timestamp, GstClockTime * duration) { GList *g; *timestamp = GST_CLOCK_TIME_NONE; *duration = GST_CLOCK_TIME_NONE; g = base_video_decoder->timestamps; while (g) { Timestamp *ts; ts = g->data; if (ts->offset <= offset) { *timestamp = ts->timestamp; *duration = ts->duration; g_slice_free (Timestamp, ts); g = g_list_next (g); base_video_decoder->timestamps = g_list_remove (base_video_decoder->timestamps, ts); } else { break; } } GST_DEBUG ("got timestamp %" G_GUINT64_FORMAT " %" GST_TIME_FORMAT, offset, GST_TIME_ARGS (*timestamp)); } static guint64 gst_base_video_decoder_get_field_timestamp (GstBaseVideoDecoder * base_video_decoder, gint field_offset) { if (base_video_decoder->state.fps_d == 0) { return GST_CLOCK_TIME_NONE; } if (field_offset < 0) { GST_WARNING ("field offset < 0"); return GST_CLOCK_TIME_NONE; } return base_video_decoder->timestamp_offset + gst_util_uint64_scale (field_offset, base_video_decoder->state.fps_d * GST_SECOND, base_video_decoder->state.fps_n * 2); } static guint64 gst_base_video_decoder_get_field_duration (GstBaseVideoDecoder * base_video_decoder, gint n_fields) { if (base_video_decoder->state.fps_d == 0) { return GST_CLOCK_TIME_NONE; } if (n_fields < 0) { GST_WARNING ("n_fields < 0"); return GST_CLOCK_TIME_NONE; } return gst_util_uint64_scale (n_fields, base_video_decoder->state.fps_d * GST_SECOND, base_video_decoder->state.fps_n * 2); } static GstVideoFrame * gst_base_video_decoder_new_frame (GstBaseVideoDecoder * base_video_decoder) { GstBaseVideoDecoderClass *base_video_decoder_class = GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder); GstVideoFrame *frame; if (base_video_decoder_class->create_frame) frame = base_video_decoder_class->create_frame (base_video_decoder); else frame = gst_video_frame_new (); return frame; } static void gst_base_video_decoder_reset (GstBaseVideoDecoder * base_video_decoder) { GST_DEBUG ("reset"); base_video_decoder->discont = TRUE; base_video_decoder->have_sync = FALSE; base_video_decoder->timestamp_offset = GST_CLOCK_TIME_NONE; base_video_decoder->last_timestamp = GST_CLOCK_TIME_NONE; base_video_decoder->input_offset = 0; base_video_decoder->current_buf_offset = -1; base_video_decoder->prev_buf_offset = -1; gst_adapter_clear (base_video_decoder->input_adapter); if (base_video_decoder->current_frame) { gst_video_frame_unref (base_video_decoder->current_frame); base_video_decoder->current_frame = NULL; } gst_base_video_decoder_clear_timestamps (base_video_decoder); base_video_decoder->have_src_caps = FALSE; GST_OBJECT_LOCK (base_video_decoder); base_video_decoder->earliest_time = GST_CLOCK_TIME_NONE; base_video_decoder->proportion = 0.5; GST_OBJECT_UNLOCK (base_video_decoder); } static void gst_base_video_decoder_flush (GstBaseVideoDecoder * base_video_decoder) { GstBaseVideoDecoderClass *base_video_decoder_class; gst_base_video_decoder_reset (base_video_decoder); base_video_decoder_class = GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder); if (base_video_decoder_class->flush) base_video_decoder_class->flush (base_video_decoder); } static void gst_base_video_decoder_reset_state (GstVideoState * state) { if (state->codec_data) gst_buffer_unref (state->codec_data); memset (state, 0, sizeof (GstVideoState)); state->par_n = state->par_d = 1; } static gboolean gst_base_video_decoder_sink_setcaps (GstPad * pad, GstCaps * caps) { GstBaseVideoDecoder *base_video_decoder; GstBaseVideoDecoderClass *base_video_decoder_class; GstStructure *structure; const GValue *codec_data; GstVideoState *state; gboolean ret = TRUE; 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 ("setcaps %" GST_PTR_FORMAT, caps); state = &base_video_decoder->state; gst_base_video_decoder_reset_state (state); structure = gst_caps_get_structure (caps, 0); gst_video_format_parse_caps (caps, NULL, &state->width, &state->height); gst_video_parse_caps_framerate (caps, &state->fps_n, &state->fps_d); gst_video_parse_caps_pixel_aspect_ratio (caps, &state->par_n, &state->par_d); gst_structure_get_boolean (structure, "interlaced", &state->interlaced); codec_data = gst_structure_get_value (structure, "codec_data"); if (codec_data && G_VALUE_TYPE (codec_data) == GST_TYPE_BUFFER) state->codec_data = gst_value_get_buffer (codec_data); if (base_video_decoder_class->set_sink_caps) ret = base_video_decoder_class->set_sink_caps (base_video_decoder, caps); g_object_unref (base_video_decoder); return ret; } static gboolean gst_base_video_decoder_sink_event (GstPad * pad, GstEvent * event) { GstBaseVideoDecoder *base_video_decoder; gboolean res = FALSE; base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_EOS: if (!base_video_decoder->packetized) gst_base_video_decoder_drain (base_video_decoder, TRUE); res = 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); res = 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); res = gst_pad_push_event (GST_BASE_VIDEO_DECODER_SRC_PAD (base_video_decoder), event); break; default: res = gst_pad_event_default (pad, event); break; } done: gst_object_unref (base_video_decoder); return res; newseg_wrong_format: GST_DEBUG_OBJECT (base_video_decoder, "received non TIME newsegment"); gst_event_unref (event); goto done; } static gboolean gst_base_video_decoder_src_event (GstPad * pad, GstEvent * event) { GstBaseVideoDecoder *base_video_decoder; gboolean res = FALSE; base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_SEEK: /* FIXME: do seek using bitrate incase upstream doesn't handle it */ res = gst_pad_push_event (GST_BASE_VIDEO_DECODER_SINK_PAD (base_video_decoder), event); break; case GST_EVENT_QOS: { gdouble proportion; GstClockTimeDiff diff; GstClockTime timestamp; GstClockTime duration; gst_event_parse_qos (event, &proportion, &diff, ×tamp); GST_OBJECT_LOCK (base_video_decoder); base_video_decoder->proportion = proportion; if (G_LIKELY (GST_CLOCK_TIME_IS_VALID (timestamp))) { if (G_UNLIKELY (diff > 0)) { if (base_video_decoder->state.fps_n > 0) duration = gst_util_uint64_scale (GST_SECOND, base_video_decoder->state.fps_d, base_video_decoder->state.fps_n); else duration = 0; base_video_decoder->earliest_time = timestamp + 2 * diff + duration; } else { base_video_decoder->earliest_time = timestamp + diff; } } else { base_video_decoder->earliest_time = GST_CLOCK_TIME_NONE; } GST_OBJECT_UNLOCK (base_video_decoder); GST_DEBUG_OBJECT (base_video_decoder, "got QoS %" GST_TIME_FORMAT ", %" G_GINT64_FORMAT ", %g", GST_TIME_ARGS (timestamp), diff, proportion); res = gst_pad_push_event (GST_BASE_VIDEO_DECODER_SINK_PAD (base_video_decoder), event); break; } default: res = gst_pad_push_event (GST_BASE_VIDEO_DECODER_SINK_PAD (base_video_decoder), event); break; } gst_object_unref (base_video_decoder); return res; } static const GstQueryType * gst_base_video_decoder_get_query_types (GstPad * pad) { static const GstQueryType query_types[] = { GST_QUERY_POSITION, GST_QUERY_DURATION, 0 }; return query_types; } static gboolean gst_base_video_decoder_src_query (GstPad * pad, GstQuery * query) { GstBaseVideoDecoder *dec; gboolean res = TRUE; dec = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad)); switch GST_QUERY_TYPE (query) { case GST_QUERY_POSITION: { GstFormat format; gint64 time; gst_query_parse_position (query, &format, NULL); GST_DEBUG ("query in format %d", format); if (format != GST_FORMAT_TIME) { goto error; } time = dec->last_timestamp; time = gst_segment_to_stream_time (&dec->segment, GST_FORMAT_TIME, time); gst_query_set_position (query, format, time); res = TRUE; break; } case GST_QUERY_DURATION: /* FIXME: approximate using bitrate if upstream doesn't answear */ res = gst_pad_query (dec->sinkpad, query); break; default: res = gst_pad_query_default (pad, query); } gst_object_unref (dec); return res; error: GST_ERROR_OBJECT (dec, "query failed"); gst_object_unref (dec); return res; } static gboolean gst_base_video_decoder_sink_query (GstPad * pad, GstQuery * query) { GstBaseVideoDecoder *base_video_decoder; gboolean res = FALSE; base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad)); GST_DEBUG_OBJECT (base_video_decoder, "sink query fps=%d/%d", base_video_decoder->state.fps_n, base_video_decoder->state.fps_d); switch (GST_QUERY_TYPE (query)) { default: res = gst_pad_query_default (pad, query); break; } gst_object_unref (base_video_decoder); return res; } 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; } static GstFlowReturn gst_base_video_decoder_drain (GstBaseVideoDecoder * dec, gboolean at_eos) { GstBaseVideoDecoderClass *klass; GstBaseVideoDecoderScanResult res; guint size; klass = GST_BASE_VIDEO_DECODER_GET_CLASS (dec); if (gst_adapter_available (dec->input_adapter) == 0) return GST_FLOW_OK; lost_sync: if (!dec->have_sync) { gint n, m; GST_DEBUG ("no sync, scanning"); n = gst_adapter_available (dec->input_adapter); m = klass->scan_for_sync (dec, dec->input_adapter); if (m == -1) { gst_object_unref (dec); return GST_FLOW_OK; } if (m < 0) { g_warning ("subclass returned negative scan %d", m); } if (m >= n) { GST_ERROR ("subclass scanned past end %d >= %d", m, n); } gst_adapter_flush (dec->input_adapter, m); if (m < n) { GST_DEBUG ("found possible sync after %d bytes (of %d)", m, n); /* this is only "maybe" sync */ dec->have_sync = TRUE; } if (!dec->have_sync) { return GST_FLOW_OK; } } res = klass->scan_for_packet_end (dec, dec->input_adapter, &size, at_eos); while (res == GST_BASE_VIDEO_DECODER_SCAN_RESULT_OK) { GstBuffer *buf; GstFlowReturn ret; GST_DEBUG ("Packet size: %u", size); if (size > gst_adapter_available (dec->input_adapter)) return GST_FLOW_OK; buf = gst_adapter_take_buffer (dec->input_adapter, size); dec->prev_buf_offset = dec->current_buf_offset; dec->current_buf_offset = dec->input_offset - gst_adapter_available (dec->input_adapter); ret = klass->parse_data (dec, buf, at_eos, dec->current_frame); if (ret != GST_FLOW_OK) return ret; res = klass->scan_for_packet_end (dec, dec->input_adapter, &size, at_eos); } switch (res) { case GST_BASE_VIDEO_DECODER_SCAN_RESULT_LOST_SYNC: dec->have_sync = FALSE; goto lost_sync; case GST_BASE_VIDEO_DECODER_SCAN_RESULT_NEED_DATA: return GST_FLOW_OK; default: GST_ERROR_OBJECT (dec, "Subclass returned invalid scan result"); return GST_FLOW_ERROR; } } static GstFlowReturn gst_base_video_decoder_chain (GstPad * pad, GstBuffer * buf) { GstBaseVideoDecoder *base_video_decoder; 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)); 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); } 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->current_frame) base_video_decoder->current_frame = gst_base_video_decoder_new_frame (base_video_decoder); 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_stop (GstBaseVideoDecoder * base_video_decoder) { GstBaseVideoDecoderClass *base_video_decoder_class; GST_DEBUG ("stop"); base_video_decoder_class = GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder); gst_base_video_decoder_reset (base_video_decoder); if (base_video_decoder_class->stop) return base_video_decoder_class->stop (base_video_decoder); return TRUE; } static gboolean gst_base_video_decoder_start (GstBaseVideoDecoder * base_video_decoder) { GstBaseVideoDecoderClass *base_video_decoder_class; GST_DEBUG ("start"); base_video_decoder_class = GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder); gst_base_video_decoder_reset (base_video_decoder); gst_base_video_decoder_reset_state (&base_video_decoder->state); gst_segment_init (&base_video_decoder->segment, GST_FORMAT_TIME); if (base_video_decoder_class->start) return base_video_decoder_class->start (base_video_decoder); return TRUE; } static GstStateChangeReturn gst_base_video_decoder_change_state (GstElement * element, GstStateChange transition) { GstBaseVideoDecoder *base_video_decoder; GstStateChangeReturn ret; base_video_decoder = GST_BASE_VIDEO_DECODER (element); switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: if (!gst_base_video_decoder_start (base_video_decoder)) return GST_STATE_CHANGE_FAILURE; break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: if (!gst_base_video_decoder_stop (base_video_decoder)) ret = GST_STATE_CHANGE_FAILURE; break; default: break; } return ret; } static gboolean gst_base_video_decoder_check_timestamp (GstBaseVideoDecoder * base_video_decoder, GstClockTime timestamp) { if (timestamp == GST_CLOCK_TIME_NONE) return FALSE; if (GST_CLOCK_TIME_IS_VALID (base_video_decoder->last_timestamp)) return timestamp > base_video_decoder->last_timestamp; return TRUE; } static void gst_base_video_decoder_calculate_timestamps (GstBaseVideoDecoder * base_video_decoder, GstVideoFrame * frame, GstClockTime * presentation_timestamp, GstClockTime * presentation_duration) { GST_DEBUG ("calculate timestamps sync=%d upstream timestamp: %" GST_TIME_FORMAT " parsed timestamp: %" GST_TIME_FORMAT, GST_VIDEO_FRAME_FLAG_IS_SET (frame, GST_VIDEO_FRAME_FLAG_SYNC_POINT), GST_TIME_ARGS (frame->upstream_timestamp), GST_TIME_ARGS (frame->parsed_timestamp)); *presentation_timestamp = GST_CLOCK_TIME_NONE; *presentation_duration = GST_CLOCK_TIME_NONE; if (gst_base_video_decoder_check_timestamp (base_video_decoder, frame->upstream_timestamp)) { *presentation_timestamp = frame->upstream_timestamp; *presentation_duration = frame->upstream_duration; } else if (gst_base_video_decoder_check_timestamp (base_video_decoder, frame->parsed_timestamp)) *presentation_timestamp = frame->parsed_timestamp; if (GST_CLOCK_TIME_IS_VALID (*presentation_timestamp)) { GST_DEBUG ("sync timestamp %" GST_TIME_FORMAT " diff %" GST_TIME_FORMAT, GST_TIME_ARGS (*presentation_timestamp), GST_TIME_ARGS (*presentation_timestamp - base_video_decoder->segment.start)); base_video_decoder->timestamp_offset = *presentation_timestamp; base_video_decoder->field_index = 0; } 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; } } *presentation_timestamp = gst_base_video_decoder_get_field_timestamp (base_video_decoder, base_video_decoder->field_index); } if (*presentation_duration == GST_CLOCK_TIME_NONE) { *presentation_duration = gst_base_video_decoder_get_field_duration (base_video_decoder, frame->n_fields); } base_video_decoder->field_index += frame->n_fields; base_video_decoder->last_timestamp = *presentation_timestamp; } 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); if (!gst_base_video_decoder_set_src_caps (base_video_decoder)) return GST_FLOW_NOT_NEGOTIATED; 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)); 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); } void gst_base_video_decoder_skip_frame (GstBaseVideoDecoder * base_video_decoder, GstVideoFrame * frame) { GstClockTime presentation_timestamp; GstClockTime presentation_duration; GST_DEBUG ("skip frame"); gst_base_video_decoder_calculate_timestamps (base_video_decoder, frame, &presentation_timestamp, &presentation_duration); GST_DEBUG ("skipping frame %" GST_TIME_FORMAT, GST_TIME_ARGS (presentation_timestamp)); gst_video_frame_unref (frame); } GstFlowReturn gst_base_video_decoder_have_frame (GstBaseVideoDecoder * base_video_decoder, gboolean include_current_buf, GstVideoFrame ** new_frame) { GstVideoFrame *frame = base_video_decoder->current_frame; GstBaseVideoDecoderClass *klass; guint64 frame_end_offset; GstClockTime timestamp, duration; GstClockTime running_time; GstClockTimeDiff deadline; GstFlowReturn ret; klass = GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder); if (include_current_buf) frame_end_offset = base_video_decoder->current_buf_offset; else frame_end_offset = base_video_decoder->prev_buf_offset; gst_base_video_decoder_get_timestamp_at_offset (base_video_decoder, frame_end_offset, ×tamp, &duration); frame->upstream_timestamp = timestamp; frame->upstream_duration = duration; GST_DEBUG ("upstream timestamp %" GST_TIME_FORMAT, GST_TIME_ARGS (frame->upstream_timestamp)); running_time = gst_segment_to_running_time (&base_video_decoder->segment, GST_FORMAT_TIME, frame->upstream_timestamp); if (GST_CLOCK_TIME_IS_VALID (base_video_decoder->earliest_time)) deadline = GST_CLOCK_DIFF (base_video_decoder->earliest_time, running_time); else deadline = G_MAXINT64; /* do something with frame */ ret = klass->handle_frame (base_video_decoder, frame, deadline); if (ret != GST_FLOW_OK) { GST_DEBUG ("flow error!"); } /* create new frame */ base_video_decoder->current_frame = gst_base_video_decoder_new_frame (base_video_decoder); if (new_frame) *new_frame = base_video_decoder->current_frame; return ret; } GstVideoState gst_base_video_decoder_get_state (GstBaseVideoDecoder * base_video_decoder) { return base_video_decoder->state; } void gst_base_video_decoder_set_state (GstBaseVideoDecoder * base_video_decoder, GstVideoState state) { base_video_decoder->state = state; base_video_decoder->have_src_caps = FALSE; } void gst_base_video_decoder_lost_sync (GstBaseVideoDecoder * base_video_decoder) { g_return_if_fail (GST_IS_BASE_VIDEO_DECODER (base_video_decoder)); GST_DEBUG ("lost_sync"); if (gst_adapter_available (base_video_decoder->input_adapter) >= 1) { gst_adapter_flush (base_video_decoder->input_adapter, 1); } base_video_decoder->have_sync = FALSE; } /* GObject vmethod implementations */ static void gst_base_video_decoder_get_property (GObject * object, guint property_id, GValue * value, GParamSpec * pspec) { GstBaseVideoDecoder *base_video_decoder = GST_BASE_VIDEO_DECODER (object); switch (property_id) { case PROP_PACKETIZED: g_value_set_boolean (value, base_video_decoder->packetized); break; case PROP_SINK_CLIPPING: g_value_set_boolean (value, base_video_decoder->sink_clipping); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); break; } } static void gst_base_video_decoder_set_property (GObject * object, guint property_id, const GValue * value, GParamSpec * pspec) { GstBaseVideoDecoder *base_video_decoder = GST_BASE_VIDEO_DECODER (object); switch (property_id) { case PROP_PACKETIZED: base_video_decoder->packetized = g_value_get_boolean (value); break; case PROP_SINK_CLIPPING: base_video_decoder->sink_clipping = g_value_get_boolean (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); break; } } static void gst_base_video_decoder_finalize (GObject * object) { GstBaseVideoDecoder *base_video_decoder; g_return_if_fail (GST_IS_BASE_VIDEO_DECODER (object)); base_video_decoder = GST_BASE_VIDEO_DECODER (object); g_object_unref (base_video_decoder->input_adapter); GST_DEBUG_OBJECT (object, "finalize"); G_OBJECT_CLASS (parent_class)->finalize (object); } static void gst_base_video_decoder_base_init (gpointer g_class) { GST_DEBUG_CATEGORY_INIT (basevideodecoder_debug, "basevideodecoder", 0, "Base Video Decoder"); } static void gst_base_video_decoder_class_init (GstBaseVideoDecoderClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = G_OBJECT_CLASS (klass); gstelement_class = GST_ELEMENT_CLASS (klass); gobject_class->finalize = gst_base_video_decoder_finalize; gobject_class->get_property = gst_base_video_decoder_get_property; gobject_class->set_property = gst_base_video_decoder_set_property; g_object_class_install_property (gobject_class, PROP_PACKETIZED, g_param_spec_boolean ("packetized", "Packetized", "Whether the incoming data is already packetized into suitable " "packets", FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PACKETIZED, g_param_spec_boolean ("sink-clipping", "Sink Clipping", "If enabled GstBaseVideoDecoder will clip outgoing frames", FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gstelement_class->change_state = gst_base_video_decoder_change_state; parent_class = g_type_class_peek_parent (klass); } static void gst_base_video_decoder_init (GstBaseVideoDecoder * base_video_decoder, GstBaseVideoDecoderClass * base_video_decoder_class) { GstPadTemplate *pad_template; GstPad *pad; GST_DEBUG ("gst_base_video_decoder_init"); pad_template = gst_element_class_get_pad_template (GST_ELEMENT_CLASS (base_video_decoder_class), "sink"); g_return_if_fail (pad_template != NULL); base_video_decoder->sinkpad = pad = gst_pad_new_from_template (pad_template, "sink"); gst_element_add_pad (GST_ELEMENT (base_video_decoder), pad); gst_pad_set_chain_function (pad, gst_base_video_decoder_chain); gst_pad_set_event_function (pad, gst_base_video_decoder_sink_event); gst_pad_set_setcaps_function (pad, gst_base_video_decoder_sink_setcaps); gst_pad_set_query_function (pad, gst_base_video_decoder_sink_query); if (base_video_decoder_class->create_srcpad) { base_video_decoder->srcpad = pad = base_video_decoder_class->create_srcpad (base_video_decoder, base_video_decoder_class); } else { pad_template = gst_element_class_get_pad_template (GST_ELEMENT_CLASS (base_video_decoder_class), "src"); g_return_if_fail (pad_template != NULL); base_video_decoder->srcpad = pad = gst_pad_new_from_template (pad_template, "src"); } gst_element_add_pad (GST_ELEMENT (base_video_decoder), pad); gst_pad_set_event_function (pad, gst_base_video_decoder_src_event); gst_pad_set_query_type_function (pad, gst_base_video_decoder_get_query_types); gst_pad_set_query_function (pad, gst_base_video_decoder_src_query); gst_pad_use_fixed_caps (pad); base_video_decoder->input_adapter = gst_adapter_new (); memset (&base_video_decoder->state, 0, sizeof (GstVideoState)); /* properties */ base_video_decoder->packetized = FALSE; base_video_decoder->sink_clipping = TRUE; }