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Merge commit '96084251e57d1738fde02a2b0d37ca609d9efd71' 

* commit '96084251e57d1738fde02a2b0d37ca609d9efd71':
  libavformat: add robust MPEG audio depacketization (RFC 5219)

Conflicts:
	Changelog
	libavformat/version.h

See: 22470510d1
Merged-by: Michael Niedermayer <michaelni@gmx.at>
tags/n2.6
Michael Niedermayer 11 years ago
parent
dedbefee60 96084251e5
commit
1186e7cf95
5 changed files with 227 additions and 206 deletions
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  1. +1
    -1
      Changelog
  2. +1
    -0
      libavformat/Makefile
  3. +224
    -0
      libavformat/rtpdec_mpa_robust.c
  4. +0
    -204
      libavformat/rtpdec_mpeg12.c
  5. +1
    -1
      libavformat/version.h

+ 1
- 1
Changelog View File

@@ -23,7 +23,7 @@ version <next>:
- Changed default DNxHD colour range in QuickTime .mov derivatives to mpeg range
- ported softpulldown filter from libmpcodecs as repeatfields filter
- dcshift filter
- RTP parser for loss tolerant payload format for MP3 audio (RFC 5219)
- RTP depacketizer for loss tolerant payload format for MP3 audio (RFC 5219)
- RTP depacketizer for AC3 payload format (RFC 4184)
- palettegen and paletteuse filters
- VP9 RTP payload format (draft 0) experimental depacketizer


+ 1
- 0
libavformat/Makefile View File

@@ -42,6 +42,7 @@ OBJS-$(CONFIG_RTPDEC) += rdt.o \
rtpdec_ilbc.o \
rtpdec_jpeg.o \
rtpdec_latm.o \
rtpdec_mpa_robust.o \
rtpdec_mpeg12.o \
rtpdec_mpeg4.o \
rtpdec_mpegts.o \


+ 224
- 0
libavformat/rtpdec_mpa_robust.c View File

@@ -0,0 +1,224 @@
/*
* RTP parser for loss tolerant payload format for MP3 audio (RFC 5219)
* Copyright (c) 2015 Gilles Chanteperdrix <gch@xenomai.org>
*
* 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/attributes.h"
#include "libavutil/intreadwrite.h"

#include "rtpdec_formats.h"

struct PayloadContext {
unsigned adu_size;
unsigned cur_size;
uint32_t timestamp;
uint8_t *split_buf;
int split_pos, split_buf_size, split_pkts;
AVIOContext *fragment;
};

static av_cold int mpa_robust_init(AVFormatContext *ctx, int st_index,
PayloadContext *data)
{
if (st_index < 0)
return 0;
ctx->streams[st_index]->need_parsing = AVSTREAM_PARSE_HEADERS;
return 0;
}

static PayloadContext *mpa_robust_new_context(void)
{
return av_mallocz(sizeof(PayloadContext));
}

static inline void free_fragment(PayloadContext *data)
{
if (data->fragment) {
uint8_t *p;
avio_close_dyn_buf(data->fragment, &p);
av_free(p);
data->fragment = NULL;
}
}

static void mpa_robust_free_context(PayloadContext *data)
{
free_fragment(data);
av_free(data->split_buf);
av_free(data);
}

static int mpa_robust_parse_rtp_header(AVFormatContext *ctx,
const uint8_t *buf, int len,
unsigned *adu_size, unsigned *cont)
{
unsigned header_size;

if (len < 2) {
av_log(ctx, AV_LOG_ERROR, "Invalid %d bytes packet\n", len);
return AVERROR_INVALIDDATA;
}

*cont = !!(buf[0] & 0x80);
if (!(buf[0] & 0x40)) {
header_size = 1;
*adu_size = buf[0] & ~0xc0;
} else {
header_size = 2;
*adu_size = AV_RB16(buf) & ~0xc000;
}

return header_size;
}

static int mpa_robust_parse_packet(AVFormatContext *ctx, PayloadContext *data,
AVStream *st, AVPacket *pkt,
uint32_t *timestamp, const uint8_t *buf,
int len, uint16_t seq, int flags)
{
unsigned adu_size, continuation;
int err, header_size;

if (!buf) {
buf = &data->split_buf[data->split_pos];
len = data->split_buf_size - data->split_pos;

header_size = mpa_robust_parse_rtp_header(ctx, buf, len, &adu_size,
&continuation);
if (header_size < 0) {
av_freep(&data->split_buf);
return header_size;
}
buf += header_size;
len -= header_size;

if (continuation || adu_size > len) {
av_freep(&data->split_buf);
av_log(ctx, AV_LOG_ERROR, "Invalid frame\n");
return AVERROR_INVALIDDATA;
}

if (av_new_packet(pkt, adu_size)) {
av_log(ctx, AV_LOG_ERROR, "Out of memory.\n");
return AVERROR(ENOMEM);
}

pkt->stream_index = st->index;
memcpy(pkt->data, buf, adu_size);

data->split_pos += adu_size;

if (data->split_pos == data->split_buf_size) {
av_freep(&data->split_buf);
return 0;
}

return 1;
}


header_size = mpa_robust_parse_rtp_header(ctx, buf, len, &adu_size,
&continuation);
if (header_size < 0)
return header_size;

buf += header_size;
len -= header_size;

if (!continuation && adu_size <= len) {
/* One or more complete frames */

if (av_new_packet(pkt, adu_size)) {
av_log(ctx, AV_LOG_ERROR, "Out of memory.\n");
return AVERROR(ENOMEM);
}

pkt->stream_index = st->index;
memcpy(pkt->data, buf, adu_size);

buf += adu_size;
len -= adu_size;
if (len) {
data->split_buf_size = len;
data->split_buf = av_malloc(data->split_buf_size);
data->split_pos = 0;
if (!data->split_buf) {
av_log(ctx, AV_LOG_ERROR, "Out of memory.\n");
av_free_packet(pkt);
return AVERROR(ENOMEM);
}
memcpy(data->split_buf, buf, data->split_buf_size);
return 1;
}
return 0;
} else if (!continuation) { /* && adu_size > len */
/* First fragment */
free_fragment(data);

data->adu_size = adu_size;
data->cur_size = len;
data->timestamp = *timestamp;

err = avio_open_dyn_buf(&data->fragment);
if (err < 0)
return err;

avio_write(data->fragment, buf, len);
return AVERROR(EAGAIN);
}
/* else continuation == 1 */

/* Fragment other than first */
if (!data->fragment) {
av_log(ctx, AV_LOG_WARNING,
"Received packet without a start fragment; dropping.\n");
return AVERROR(EAGAIN);
}
if (adu_size = data->adu_size ||
data->timestamp != *timestamp) {
free_fragment(data);
av_log(ctx, AV_LOG_ERROR, "Invalid packet received\n");
return AVERROR_INVALIDDATA;
}

avio_write(data->fragment, buf, len);
data->cur_size += len;

if (data->cur_size < data->adu_size)
return AVERROR(EAGAIN);

err = ff_rtp_finalize_packet(pkt, &data->fragment, st->index);
if (err < 0) {
av_log(ctx, AV_LOG_ERROR,
"Error occurred when getting fragment buffer.\n");
return err;
}

return 0;
}

RTPDynamicProtocolHandler ff_mpeg_audio_robust_dynamic_handler = {
.codec_type = AVMEDIA_TYPE_AUDIO,
.codec_id = AV_CODEC_ID_MP3ADU,
.init = mpa_robust_init,
.alloc = mpa_robust_new_context,
.free = mpa_robust_free_context,
.parse_packet = mpa_robust_parse_packet,
.enc_name = "mpa-robust",
};

+ 0
- 204
libavformat/rtpdec_mpeg12.c View File

@@ -2,9 +2,6 @@
* Common code for the RTP depacketization of MPEG-1/2 formats.
* Copyright (c) 2002 Fabrice Bellard
*
* RTP parser for loss tolerant payload format for MP3 audio (RFC 5219)
* Copyright (c) 2015 Gilles Chanteperdrix <gch@xenomai.org>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
@@ -26,8 +23,6 @@
#include "libavutil/intreadwrite.h"
#include "rtpdec_formats.h"

#define RTP_MPA_PAYLOAD_HEADER_SIZE 1

static av_cold int mpeg_init(AVFormatContext *ctx, int st_index, PayloadContext *data)
{
if (st_index < 0)
@@ -76,202 +71,3 @@ RTPDynamicProtocolHandler ff_mpeg_video_dynamic_handler = {
.parse_packet = mpeg_parse_packet,
.static_payload_id = 32,
};

/* MPA-ROBUST, RFC 5219 */
struct PayloadContext {
unsigned adu_size;
unsigned cur_size;
uint32_t timestamp;
uint8_t *split_buf;
int split_pos, split_buf_size, split_pkts;
AVIOContext *fragment;
};

static av_cold int mpa_robust_init(AVFormatContext *ctx, int st_index,
PayloadContext *data)
{
if (st_index < 0)
return 0;
ctx->streams[st_index]->need_parsing = AVSTREAM_PARSE_HEADERS;
return 0;
}

static PayloadContext *mpa_robust_new_context(void)
{
return av_mallocz(sizeof(PayloadContext));
}

static inline void free_fragment_if_needed(PayloadContext *data)
{
if (data->fragment) {
uint8_t *p;
avio_close_dyn_buf(data->fragment, &p);
av_free(p);
data->fragment = NULL;
}
}

static void mpa_robust_free_context(PayloadContext *data)
{
free_fragment_if_needed(data);
av_free(data);
}

static int mpa_robust_parse_rtp_header(AVFormatContext *ctx,
const uint8_t *buf, int len,
unsigned *adu_size, unsigned *cont)
{
unsigned header_size;

if (len < RTP_MPA_PAYLOAD_HEADER_SIZE + 1) {
av_log(ctx, AV_LOG_ERROR, "Invalid %d bytes packet\n", len);
return AVERROR_INVALIDDATA;
}

*cont = !!(buf[0] & 0x80);
if (!(buf[0] & 0x40)) {
header_size = 1;
*adu_size = buf[0] & ~0xc0;
} else {
header_size = 2;
*adu_size = AV_RB16(buf) & ~0xc000;
}

return header_size;
}

static int mpa_robust_parse_packet(AVFormatContext *ctx, PayloadContext *data,
AVStream *st, AVPacket *pkt,
uint32_t *timestamp, const uint8_t *buf,
int len, uint16_t seq, int flags)
{
unsigned adu_size, continuation;
int err, header_size;

if (!buf) {
buf = &data->split_buf[data->split_pos];
len = data->split_buf_size - data->split_pos;

header_size = mpa_robust_parse_rtp_header(ctx, buf, len, &adu_size,
&continuation);
if (header_size < 0) {
av_freep(&data->split_buf);
return header_size;
}
buf += header_size;
len -= header_size;

if (continuation || adu_size > len) {
av_freep(&data->split_buf);
av_log(ctx, AV_LOG_ERROR, "Invalid frame\n");
return AVERROR_INVALIDDATA;
}

if (av_new_packet(pkt, adu_size)) {
av_log(ctx, AV_LOG_ERROR, "Out of memory.\n");
return AVERROR(ENOMEM);
}

pkt->stream_index = st->index;
memcpy(pkt->data, buf, adu_size);

data->split_pos = (buf - data->split_buf) + adu_size;

if (data->split_pos == data->split_buf_size) {
av_freep(&data->split_buf);
return 0;
}

return 1;
}


header_size = mpa_robust_parse_rtp_header(ctx, buf, len, &adu_size,
&continuation);
if (header_size < 0)
return header_size;

buf += header_size;
len -= header_size;

if (!continuation && adu_size <= len) {
/* One or more complete frames */

if (av_new_packet(pkt, adu_size)) {
av_log(ctx, AV_LOG_ERROR, "Out of memory.\n");
return AVERROR(ENOMEM);
}

pkt->stream_index = st->index;
memcpy(pkt->data, buf, adu_size);

buf += adu_size;
len -= adu_size;
if (len) {
data->split_buf_size = len;
data->split_buf = av_malloc(data->split_buf_size);
data->split_pos = 0;
if (!data->split_buf) {
av_log(ctx, AV_LOG_ERROR, "Out of memory.\n");
av_free_packet(pkt);
return AVERROR(ENOMEM);
}
memcpy(data->split_buf, buf, data->split_buf_size);
return 1;
}
return 0;
} else if (!continuation) { /* && adu_size > len */
/* First fragment */
free_fragment_if_needed(data);

data->adu_size = adu_size;
data->cur_size = len;
data->timestamp = *timestamp;

err = avio_open_dyn_buf(&data->fragment);
if (err < 0)
return err;

avio_write(data->fragment, buf, len);
return AVERROR(EAGAIN);
}
/* else continuation == 1 */

/* Fragment other than first */
if (!data->fragment) {
av_log(ctx, AV_LOG_WARNING,
"Received packet without a start fragment; dropping.\n");
return AVERROR(EAGAIN);
}
if (adu_size = data->adu_size ||
data->timestamp != *timestamp) {
free_fragment_if_needed(data);
av_log(ctx, AV_LOG_ERROR, "Invalid packet received\n");
return AVERROR_INVALIDDATA;
}

avio_write(data->fragment, buf, len);
data->cur_size += len;

if (data->cur_size < data->adu_size)
return AVERROR(EAGAIN);

err = ff_rtp_finalize_packet(pkt, &data->fragment, st->index);
if (err < 0) {
av_log(ctx, AV_LOG_ERROR,
"Error occurred when getting fragment buffer.");
return err;
}

return 0;
}

RTPDynamicProtocolHandler ff_mpeg_audio_robust_dynamic_handler = {
.codec_type = AVMEDIA_TYPE_AUDIO,
.codec_id = AV_CODEC_ID_MP3ADU,
.init = mpa_robust_init,
.alloc = mpa_robust_new_context,
.free = mpa_robust_free_context,
.parse_packet = mpa_robust_parse_packet,
.enc_name = "mpa-robust",
};

+ 1
- 1
libavformat/version.h View File

@@ -32,7 +32,7 @@
#define LIBAVFORMAT_VERSION_MAJOR 56

#define LIBAVFORMAT_VERSION_MINOR 23
#define LIBAVFORMAT_VERSION_MICRO 102
#define LIBAVFORMAT_VERSION_MICRO 103

#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \


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