mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-08 08:58:25 -05:00
226 lines
7.4 KiB
C
Executable File
226 lines
7.4 KiB
C
Executable File
/*
|
|
* RTP parser for VC-2 HQ payload format (draft version 1) - experimental
|
|
* Copyright (c) 2016 Thomas Volkert <thomas@netzeal.de>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "libavcodec/dirac.h"
|
|
|
|
#include "avio_internal.h"
|
|
#include "rtpdec_formats.h"
|
|
|
|
#define RTP_VC2HQ_PL_HEADER_SIZE 4
|
|
|
|
#define DIRAC_DATA_UNIT_HEADER_SIZE 13
|
|
#define DIRAC_PIC_NR_SIZE 4
|
|
#define DIRAC_RTP_PCODE_HQ_PIC_FRAGMENT 0xEC
|
|
|
|
struct PayloadContext {
|
|
AVIOContext *buf;
|
|
uint32_t frame_size;
|
|
uint32_t frame_nr;
|
|
uint32_t timestamp;
|
|
uint32_t last_unit_size;
|
|
int seen_sequence_header;
|
|
};
|
|
|
|
static const uint8_t start_sequence[] = { 'B', 'B', 'C', 'D' };
|
|
|
|
static void fill_parse_info_header(PayloadContext *pl_ctx, uint8_t *buf,
|
|
uint8_t parse_code, uint32_t data_unit_size)
|
|
{
|
|
memcpy(buf, start_sequence, sizeof(start_sequence));
|
|
buf[4] = parse_code;
|
|
AV_WB32(&buf[5], data_unit_size);
|
|
AV_WB32(&buf[9], pl_ctx->last_unit_size);
|
|
|
|
pl_ctx->last_unit_size = data_unit_size;
|
|
}
|
|
|
|
static int vc2hq_handle_sequence_header(PayloadContext *pl_ctx, AVStream *st, AVPacket *pkt,
|
|
const uint8_t *buf, int len)
|
|
{
|
|
int res;
|
|
uint32_t size = DIRAC_DATA_UNIT_HEADER_SIZE + len;
|
|
|
|
if ((res = av_new_packet(pkt, DIRAC_DATA_UNIT_HEADER_SIZE + len)) < 0)
|
|
return res;
|
|
|
|
fill_parse_info_header(pl_ctx, pkt->data, 0x00, size);
|
|
/* payload of seq. header */
|
|
memcpy(pkt->data + DIRAC_DATA_UNIT_HEADER_SIZE, buf, len);
|
|
pkt->stream_index = st->index;
|
|
|
|
pl_ctx->seen_sequence_header = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vc2hq_mark_end_of_sequence(PayloadContext *pl_ctx, AVStream *st, AVPacket *pkt)
|
|
{
|
|
int res;
|
|
uint32_t size = 0;
|
|
|
|
/* create A/V packet */
|
|
if ((res = av_new_packet(pkt, DIRAC_DATA_UNIT_HEADER_SIZE)) < 0)
|
|
return res;
|
|
|
|
fill_parse_info_header(pl_ctx, pkt->data, 0x10, size);
|
|
pkt->stream_index = st->index;
|
|
|
|
pl_ctx->seen_sequence_header = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vc2hq_handle_frame_fragment(AVFormatContext *ctx, PayloadContext *pl_ctx, AVStream *st,
|
|
AVPacket *pkt, uint32_t *timestamp, const uint8_t *buf, int len,
|
|
int flags)
|
|
{
|
|
int res;
|
|
uint32_t pic_nr;
|
|
uint16_t frag_len;
|
|
uint16_t no_slices;
|
|
|
|
/* sanity check for size of input packet: 16 bytes header in any case as minimum */
|
|
if (len < 16) {
|
|
av_log(ctx, AV_LOG_ERROR, "Too short RTP/VC2hq packet, got %d bytes\n", len);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
pic_nr = AV_RB32(&buf[4]);
|
|
frag_len = AV_RB16(&buf[12]);
|
|
no_slices = AV_RB16(&buf[14]);
|
|
|
|
if (pl_ctx->buf && pl_ctx->frame_nr != pic_nr) {
|
|
av_log(ctx, AV_LOG_WARNING, "Dropping buffered RTP/VC2hq packet fragments - non-continuous picture numbers\n");
|
|
ffio_free_dyn_buf(&pl_ctx->buf);
|
|
}
|
|
|
|
/* transform parameters? */
|
|
if (no_slices == 0) {
|
|
if (len < frag_len + 16) {
|
|
av_log(ctx, AV_LOG_ERROR, "Too short RTP/VC2hq packet, got %d bytes\n", len);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/* start frame buffering with new dynamic buffer */
|
|
if (!pl_ctx->buf) {
|
|
|
|
res = avio_open_dyn_buf(&pl_ctx->buf);
|
|
if (res < 0)
|
|
return res;
|
|
|
|
/* reserve memory for frame header */
|
|
res = avio_seek(pl_ctx->buf, DIRAC_DATA_UNIT_HEADER_SIZE + DIRAC_PIC_NR_SIZE, SEEK_SET);
|
|
if (res < 0)
|
|
return res;
|
|
|
|
pl_ctx->frame_nr = pic_nr;
|
|
pl_ctx->timestamp = *timestamp;
|
|
pl_ctx->frame_size = DIRAC_DATA_UNIT_HEADER_SIZE + DIRAC_PIC_NR_SIZE;
|
|
}
|
|
|
|
avio_write(pl_ctx->buf, buf + 16 /* skip pl header */, frag_len);
|
|
pl_ctx->frame_size += frag_len;
|
|
|
|
return AVERROR(EAGAIN);
|
|
} else {
|
|
if (len < frag_len + 20) {
|
|
av_log(ctx, AV_LOG_ERROR, "Too short RTP/VC2hq packet, got %d bytes\n", len);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/* transform parameters were missed, no buffer available */
|
|
if (!pl_ctx->buf)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
avio_write(pl_ctx->buf, buf + 20 /* skip pl header */, frag_len);
|
|
pl_ctx->frame_size += frag_len;
|
|
|
|
/* RTP marker bit means: last fragment of current frame was received;
|
|
otherwise, an additional fragment is needed for the current frame */
|
|
if (!(flags & RTP_FLAG_MARKER))
|
|
return AVERROR(EAGAIN);
|
|
}
|
|
|
|
/* close frame buffering and create A/V packet */
|
|
res = ff_rtp_finalize_packet(pkt, &pl_ctx->buf, st->index);
|
|
if (res < 0)
|
|
return res;
|
|
|
|
fill_parse_info_header(pl_ctx, pkt->data, DIRAC_PCODE_PICTURE_HQ, pl_ctx->frame_size);
|
|
AV_WB32(&pkt->data[13], pl_ctx->frame_nr);
|
|
|
|
pl_ctx->frame_size = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vc2hq_handle_packet(AVFormatContext *ctx, PayloadContext *pl_ctx,
|
|
AVStream *st, AVPacket *pkt, uint32_t *timestamp,
|
|
const uint8_t *buf, int len, uint16_t seq,
|
|
int flags)
|
|
{
|
|
uint8_t parse_code = 0;
|
|
int res = 0;
|
|
|
|
if (pl_ctx->buf && pl_ctx->timestamp != *timestamp) {
|
|
av_log(ctx, AV_LOG_WARNING, "Dropping buffered RTP/VC2hq packet fragments - non-continuous timestamps\n");
|
|
ffio_free_dyn_buf(&pl_ctx->buf);
|
|
pl_ctx->frame_size = 0;
|
|
}
|
|
|
|
/* sanity check for size of input packet: needed header data as minimum */
|
|
if (len < RTP_VC2HQ_PL_HEADER_SIZE) {
|
|
av_log(ctx, AV_LOG_ERROR, "Too short RTP/VC2hq packet, got %d bytes\n", len);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
parse_code = buf[3];
|
|
|
|
/* wait for next sequence header? */
|
|
if (pl_ctx->seen_sequence_header || parse_code == DIRAC_PCODE_SEQ_HEADER) {
|
|
switch(parse_code) {
|
|
/* sequence header */
|
|
case DIRAC_PCODE_SEQ_HEADER:
|
|
res = vc2hq_handle_sequence_header(pl_ctx, st, pkt, buf + RTP_VC2HQ_PL_HEADER_SIZE, len - RTP_VC2HQ_PL_HEADER_SIZE);
|
|
break;
|
|
/* end of sequence */
|
|
case DIRAC_PCODE_END_SEQ:
|
|
res = vc2hq_mark_end_of_sequence(pl_ctx, st, pkt);
|
|
break;
|
|
/* HQ picture fragment */
|
|
case DIRAC_RTP_PCODE_HQ_PIC_FRAGMENT:
|
|
res = vc2hq_handle_frame_fragment(ctx, pl_ctx, st, pkt, timestamp, buf, len, flags);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
const RTPDynamicProtocolHandler ff_vc2hq_dynamic_handler = {
|
|
.enc_name = "VC2",
|
|
.codec_type = AVMEDIA_TYPE_VIDEO,
|
|
.codec_id = AV_CODEC_ID_DIRAC,
|
|
.priv_data_size = sizeof(PayloadContext),
|
|
.parse_packet = vc2hq_handle_packet
|
|
};
|