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rtpdec: support for VC-2 HQ RTP payload format (draft v1)
This commit is contained in:
Thomas Volkert
parent
df34b70098
commit
b4f32c42ab
@ -12,6 +12,7 @@ version <next>:
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- ciescope filter
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- protocol blacklisting API
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- MediaCodec H264 decoding
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- VC-2 HQ RTP payload format (draft v1) depacketizer
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version 3.0:
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@ -54,6 +54,7 @@ OBJS-$(CONFIG_RTPDEC) += rdt.o \
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rtpdec_qdm2.o \
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rtpdec_qt.o \
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rtpdec_svq3.o \
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rtpdec_vc2hq.o \
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rtpdec_vp8.o \
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rtpdec_vp9.o \
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rtpdec_xiph.o \
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@ -105,6 +105,7 @@ void ff_register_rtp_dynamic_payload_handlers(void)
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ff_register_dynamic_payload_handler(&ff_quicktime_rtp_vid_handler);
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ff_register_dynamic_payload_handler(&ff_svq3_dynamic_handler);
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ff_register_dynamic_payload_handler(&ff_theora_dynamic_handler);
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ff_register_dynamic_payload_handler(&ff_vc2hq_dynamic_handler);
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ff_register_dynamic_payload_handler(&ff_vorbis_dynamic_handler);
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ff_register_dynamic_payload_handler(&ff_vp8_dynamic_handler);
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ff_register_dynamic_payload_handler(&ff_vp9_dynamic_handler);
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@ -713,6 +714,7 @@ static int enqueue_packet(RTPDemuxContext *s, uint8_t *buf, int len)
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packet->next = *cur;
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*cur = packet;
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s->queue_len++;
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av_log(0, AV_LOG_ERROR, "queue: %d\n", s->queue_len);
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return 0;
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}
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@ -80,6 +80,7 @@ extern RTPDynamicProtocolHandler ff_quicktime_rtp_aud_handler;
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extern RTPDynamicProtocolHandler ff_quicktime_rtp_vid_handler;
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extern RTPDynamicProtocolHandler ff_svq3_dynamic_handler;
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extern RTPDynamicProtocolHandler ff_theora_dynamic_handler;
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extern RTPDynamicProtocolHandler ff_vc2hq_dynamic_handler;
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extern RTPDynamicProtocolHandler ff_vorbis_dynamic_handler;
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extern RTPDynamicProtocolHandler ff_vp8_dynamic_handler;
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extern RTPDynamicProtocolHandler ff_vp9_dynamic_handler;
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225
libavformat/rtpdec_vc2hq.c
Normal file
225
libavformat/rtpdec_vc2hq.c
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@ -0,0 +1,225 @@
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/*
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* RTP parser for VC-2 HQ payload format (draft version 1) - experimental
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* Copyright (c) 2016 Thomas Volkert <thomas@netzeal.de>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/intreadwrite.h"
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#include "libavcodec/dirac.h"
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#include "avio_internal.h"
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#include "rtpdec_formats.h"
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#define RTP_VC2HQ_PL_HEADER_SIZE 4
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#define DIRAC_DATA_UNIT_HEADER_SIZE 13
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#define DIRAC_PIC_NR_SIZE 4
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#define DIRAC_RTP_PCODE_HQ_PIC_FRAGMENT 0xEC
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struct PayloadContext {
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AVIOContext *buf;
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uint32_t frame_size;
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uint32_t frame_nr;
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uint32_t timestamp;
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uint32_t last_unit_size;
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int seen_sequence_header;
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};
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static const uint8_t start_sequence[] = { 'B', 'B', 'C', 'D' };
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static void fill_parse_info_header(PayloadContext *pl_ctx, uint8_t *buf,
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uint8_t parse_code, uint32_t data_unit_size)
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{
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memcpy(buf, start_sequence, sizeof(start_sequence));
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buf[4] = parse_code;
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AV_WB32(&buf[5], data_unit_size);
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AV_WB32(&buf[9], pl_ctx->last_unit_size);
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pl_ctx->last_unit_size = data_unit_size;
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}
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static int vc2hq_handle_sequence_header(PayloadContext *pl_ctx, AVStream *st, AVPacket *pkt,
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const uint8_t *buf, int len)
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{
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int res;
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uint32_t size = DIRAC_DATA_UNIT_HEADER_SIZE + len;
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if ((res = av_new_packet(pkt, DIRAC_DATA_UNIT_HEADER_SIZE + len)) < 0)
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return res;
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fill_parse_info_header(pl_ctx, pkt->data, 0x00, size);
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/* payload of seq. header */
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memcpy(pkt->data + DIRAC_DATA_UNIT_HEADER_SIZE, buf, len);
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pkt->stream_index = st->index;
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pl_ctx->seen_sequence_header = 1;
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return 0;
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}
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static int vc2hq_mark_end_of_sequence(PayloadContext *pl_ctx, AVStream *st, AVPacket *pkt)
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{
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int res;
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uint32_t size = 0;
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/* create A/V packet */
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if ((res = av_new_packet(pkt, DIRAC_DATA_UNIT_HEADER_SIZE)) < 0)
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return res;
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fill_parse_info_header(pl_ctx, pkt->data, 0x10, size);
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pkt->stream_index = st->index;
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pl_ctx->seen_sequence_header = 0;
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return 0;
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}
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static int vc2hq_handle_frame_fragment(AVFormatContext *ctx, PayloadContext *pl_ctx, AVStream *st,
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AVPacket *pkt, uint32_t *timestamp, const uint8_t *buf, int len,
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int flags)
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{
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int res;
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uint32_t pic_nr;
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uint16_t frag_len;
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uint16_t no_slices;
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/* sanity check for size of input packet: 16 bytes header in any case as minimum */
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if (len < 16) {
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av_log(ctx, AV_LOG_ERROR, "Too short RTP/VC2hq packet, got %d bytes\n", len);
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return AVERROR_INVALIDDATA;
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}
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pic_nr = AV_RB32(&buf[4]);
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frag_len = AV_RB16(&buf[12]);
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no_slices = AV_RB16(&buf[14]);
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if (pl_ctx->buf && pl_ctx->frame_nr != pic_nr) {
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av_log(ctx, AV_LOG_WARNING, "Dropping buffered RTP/VC2hq packet fragments - non-continuous picture numbers\n");
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ffio_free_dyn_buf(&pl_ctx->buf);
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}
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/* transform parameters? */
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if (no_slices == 0) {
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if (len < frag_len + 16) {
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av_log(ctx, AV_LOG_ERROR, "Too short RTP/VC2hq packet, got %d bytes\n", len);
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return AVERROR_INVALIDDATA;
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}
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/* start frame buffering with new dynamic buffer */
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if (!pl_ctx->buf) {
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res = avio_open_dyn_buf(&pl_ctx->buf);
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if (res < 0)
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return res;
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/* reserve memory for frame header */
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res = avio_seek(pl_ctx->buf, DIRAC_DATA_UNIT_HEADER_SIZE + DIRAC_PIC_NR_SIZE, SEEK_SET);
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if (res < 0)
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return res;
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pl_ctx->frame_nr = pic_nr;
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pl_ctx->timestamp = *timestamp;
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pl_ctx->frame_size = DIRAC_DATA_UNIT_HEADER_SIZE + DIRAC_PIC_NR_SIZE;
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}
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avio_write(pl_ctx->buf, buf + 16 /* skip pl header */, frag_len);
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pl_ctx->frame_size += frag_len;
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return AVERROR(EAGAIN);
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} else {
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if (len < frag_len + 20) {
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av_log(ctx, AV_LOG_ERROR, "Too short RTP/VC2hq packet, got %d bytes\n", len);
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return AVERROR_INVALIDDATA;
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}
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/* transform parameters were missed, no buffer available */
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if (!pl_ctx->buf)
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return AVERROR_INVALIDDATA;
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avio_write(pl_ctx->buf, buf + 20 /* skip pl header */, frag_len);
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pl_ctx->frame_size += frag_len;
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/* RTP marker bit means: last fragment of current frame was received;
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otherwise, an additional fragment is needed for the current frame */
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if (!(flags & RTP_FLAG_MARKER))
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return AVERROR(EAGAIN);
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}
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/* close frame buffering and create A/V packet */
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res = ff_rtp_finalize_packet(pkt, &pl_ctx->buf, st->index);
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if (res < 0)
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return res;
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fill_parse_info_header(pl_ctx, pkt->data, 0xE8, pl_ctx->frame_size);
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AV_WB32(&pkt->data[13], pl_ctx->frame_nr);
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pl_ctx->frame_size = 0;
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return 0;
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}
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static int vc2hq_handle_packet(AVFormatContext *ctx, PayloadContext *pl_ctx,
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AVStream *st, AVPacket *pkt, uint32_t *timestamp,
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const uint8_t *buf, int len, uint16_t seq,
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int flags)
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{
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uint8_t parse_code = 0;
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int res = 0;
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if (pl_ctx->buf && pl_ctx->timestamp != *timestamp) {
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av_log(ctx, AV_LOG_WARNING, "Dropping buffered RTP/VC2hq packet fragments - non-continuous timestamps\n");
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ffio_free_dyn_buf(&pl_ctx->buf);
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pl_ctx->frame_size = 0;
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}
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/* sanity check for size of input packet: needed header data as minimum */
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if (len < RTP_VC2HQ_PL_HEADER_SIZE) {
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av_log(ctx, AV_LOG_ERROR, "Too short RTP/VC2hq packet, got %d bytes\n", len);
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return AVERROR_INVALIDDATA;
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}
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parse_code = buf[3];
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/* wait for next sequence header? */
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if (pl_ctx->seen_sequence_header || parse_code == DIRAC_PCODE_SEQ_HEADER) {
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switch(parse_code) {
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/* sequence header */
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case DIRAC_PCODE_SEQ_HEADER:
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res = vc2hq_handle_sequence_header(pl_ctx, st, pkt, buf + RTP_VC2HQ_PL_HEADER_SIZE, len - RTP_VC2HQ_PL_HEADER_SIZE);
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break;
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/* end of sequence */
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case DIRAC_PCODE_END_SEQ:
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res = vc2hq_mark_end_of_sequence(pl_ctx, st, pkt);
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break;
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/* HQ picture fragment */
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case DIRAC_RTP_PCODE_HQ_PIC_FRAGMENT:
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res = vc2hq_handle_frame_fragment(ctx, pl_ctx, st, pkt, timestamp, buf, len, flags);
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break;
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}
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}
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return res;
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}
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RTPDynamicProtocolHandler ff_vc2hq_dynamic_handler = {
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.enc_name = "VC2",
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.codec_type = AVMEDIA_TYPE_VIDEO,
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.codec_id = AV_CODEC_ID_DIRAC,
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.priv_data_size = sizeof(PayloadContext),
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.parse_packet = vc2hq_handle_packet
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};
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@ -30,8 +30,8 @@
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#include "libavutil/version.h"
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#define LIBAVFORMAT_VERSION_MAJOR 57
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#define LIBAVFORMAT_VERSION_MINOR 28
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#define LIBAVFORMAT_VERSION_MICRO 102
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#define LIBAVFORMAT_VERSION_MINOR 29
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#define LIBAVFORMAT_VERSION_MICRO 100
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#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
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LIBAVFORMAT_VERSION_MINOR, \
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