2007-09-06 15:36:07 +03:00
|
|
|
/*
|
2009-05-13 09:06:59 +03:00
|
|
|
* H.264 MP4 to Annex B byte stream format filter
|
2008-11-17 16:04:56 +02:00
|
|
|
* Copyright (c) 2007 Benoit Fouet <benoit.fouet@free.fr>
|
2007-09-06 15:36:07 +03:00
|
|
|
*
|
|
|
|
* 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
|
|
|
|
*/
|
|
|
|
|
2012-08-06 16:49:32 +03:00
|
|
|
#include <string.h>
|
|
|
|
|
2009-01-12 00:19:48 +02:00
|
|
|
#include "libavutil/intreadwrite.h"
|
2012-08-06 16:49:32 +03:00
|
|
|
#include "libavutil/mem.h"
|
2007-09-06 15:36:07 +03:00
|
|
|
#include "avcodec.h"
|
|
|
|
|
|
|
|
typedef struct H264BSFContext {
|
|
|
|
uint8_t length_size;
|
|
|
|
uint8_t first_idr;
|
2010-06-09 09:47:01 +03:00
|
|
|
int extradata_parsed;
|
2007-09-06 15:36:07 +03:00
|
|
|
} H264BSFContext;
|
|
|
|
|
2013-06-11 17:12:01 +03:00
|
|
|
static int alloc_and_copy(uint8_t **poutbuf, int *poutbuf_size,
|
2010-06-10 09:00:37 +03:00
|
|
|
const uint8_t *sps_pps, uint32_t sps_pps_size,
|
2013-06-11 17:12:01 +03:00
|
|
|
const uint8_t *in, uint32_t in_size)
|
|
|
|
{
|
|
|
|
uint32_t offset = *poutbuf_size;
|
2007-09-06 15:36:07 +03:00
|
|
|
uint8_t nal_header_size = offset ? 3 : 4;
|
2013-12-06 15:44:17 +03:00
|
|
|
int err;
|
2007-09-06 15:36:07 +03:00
|
|
|
|
2013-06-11 17:12:01 +03:00
|
|
|
*poutbuf_size += sps_pps_size + in_size + nal_header_size;
|
2013-12-06 15:44:17 +03:00
|
|
|
if ((err = av_reallocp(poutbuf,
|
|
|
|
*poutbuf_size + FF_INPUT_BUFFER_PADDING_SIZE)) < 0) {
|
|
|
|
*poutbuf_size = 0;
|
|
|
|
return err;
|
|
|
|
}
|
2007-09-06 15:36:07 +03:00
|
|
|
if (sps_pps)
|
2013-06-11 17:12:01 +03:00
|
|
|
memcpy(*poutbuf + offset, sps_pps, sps_pps_size);
|
|
|
|
memcpy(*poutbuf + sps_pps_size + nal_header_size + offset, in, in_size);
|
2010-06-10 09:00:06 +03:00
|
|
|
if (!offset) {
|
2013-06-11 17:12:01 +03:00
|
|
|
AV_WB32(*poutbuf + sps_pps_size, 1);
|
2010-06-10 09:00:06 +03:00
|
|
|
} else {
|
2013-06-11 17:12:01 +03:00
|
|
|
(*poutbuf + offset + sps_pps_size)[0] =
|
|
|
|
(*poutbuf + offset + sps_pps_size)[1] = 0;
|
|
|
|
(*poutbuf + offset + sps_pps_size)[2] = 1;
|
2007-09-06 15:36:07 +03:00
|
|
|
}
|
2010-06-10 08:59:22 +03:00
|
|
|
|
|
|
|
return 0;
|
2007-09-06 15:36:07 +03:00
|
|
|
}
|
|
|
|
|
2013-06-11 17:44:04 +03:00
|
|
|
static int h264_extradata_to_annexb(AVCodecContext *avctx, const int padding)
|
|
|
|
{
|
|
|
|
uint16_t unit_size;
|
|
|
|
uint64_t total_size = 0;
|
|
|
|
uint8_t *out = NULL, unit_nb, sps_done = 0,
|
|
|
|
sps_seen = 0, pps_seen = 0;
|
|
|
|
const uint8_t *extradata = avctx->extradata + 4;
|
|
|
|
static const uint8_t nalu_header[4] = { 0, 0, 0, 1 };
|
|
|
|
int length_size = (*extradata++ & 0x3) + 1; // retrieve length coded size
|
|
|
|
|
|
|
|
/* retrieve sps and pps unit(s) */
|
|
|
|
unit_nb = *extradata++ & 0x1f; /* number of sps unit(s) */
|
|
|
|
if (!unit_nb) {
|
2013-06-16 23:51:56 +03:00
|
|
|
goto pps;
|
2013-06-11 17:44:04 +03:00
|
|
|
} else {
|
|
|
|
sps_seen = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
while (unit_nb--) {
|
2013-12-06 15:44:17 +03:00
|
|
|
int err;
|
2013-06-11 17:44:04 +03:00
|
|
|
|
|
|
|
unit_size = AV_RB16(extradata);
|
|
|
|
total_size += unit_size + 4;
|
2013-07-14 19:26:00 +03:00
|
|
|
if (total_size > INT_MAX - padding) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
|
|
"Too big extradata size, corrupted stream or invalid MP4/AVCC bitstream\n");
|
|
|
|
av_free(out);
|
|
|
|
return AVERROR(EINVAL);
|
|
|
|
}
|
|
|
|
if (extradata + 2 + unit_size > avctx->extradata + avctx->extradata_size) {
|
|
|
|
av_log(avctx, AV_LOG_ERROR, "Packet header is not contained in global extradata, "
|
|
|
|
"corrupted stream or invalid MP4/AVCC bitstream\n");
|
2013-06-11 17:44:04 +03:00
|
|
|
av_free(out);
|
|
|
|
return AVERROR(EINVAL);
|
|
|
|
}
|
2013-12-06 15:44:17 +03:00
|
|
|
if ((err = av_reallocp(&out, total_size + padding)) < 0)
|
|
|
|
return err;
|
2013-06-11 17:44:04 +03:00
|
|
|
memcpy(out + total_size - unit_size - 4, nalu_header, 4);
|
|
|
|
memcpy(out + total_size - unit_size, extradata + 2, unit_size);
|
|
|
|
extradata += 2 + unit_size;
|
2013-06-16 23:51:56 +03:00
|
|
|
pps:
|
2013-06-11 17:44:04 +03:00
|
|
|
if (!unit_nb && !sps_done++) {
|
|
|
|
unit_nb = *extradata++; /* number of pps unit(s) */
|
|
|
|
if (unit_nb)
|
|
|
|
pps_seen = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (out)
|
|
|
|
memset(out + total_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
|
|
|
|
|
|
|
|
if (!sps_seen)
|
|
|
|
av_log(avctx, AV_LOG_WARNING,
|
|
|
|
"Warning: SPS NALU missing or invalid. "
|
|
|
|
"The resulting stream may not play.\n");
|
|
|
|
|
|
|
|
if (!pps_seen)
|
|
|
|
av_log(avctx, AV_LOG_WARNING,
|
|
|
|
"Warning: PPS NALU missing or invalid. "
|
|
|
|
"The resulting stream may not play.\n");
|
|
|
|
|
|
|
|
av_free(avctx->extradata);
|
|
|
|
avctx->extradata = out;
|
|
|
|
avctx->extradata_size = total_size;
|
|
|
|
|
|
|
|
return length_size;
|
|
|
|
}
|
|
|
|
|
2007-09-06 15:36:07 +03:00
|
|
|
static int h264_mp4toannexb_filter(AVBitStreamFilterContext *bsfc,
|
|
|
|
AVCodecContext *avctx, const char *args,
|
2013-06-11 17:12:01 +03:00
|
|
|
uint8_t **poutbuf, int *poutbuf_size,
|
|
|
|
const uint8_t *buf, int buf_size,
|
|
|
|
int keyframe)
|
|
|
|
{
|
2007-09-06 15:36:07 +03:00
|
|
|
H264BSFContext *ctx = bsfc->priv_data;
|
2012-03-22 00:33:28 +03:00
|
|
|
int i;
|
2007-09-06 15:36:07 +03:00
|
|
|
uint8_t unit_type;
|
2010-05-10 10:08:57 +03:00
|
|
|
int32_t nal_size;
|
2013-06-11 17:12:01 +03:00
|
|
|
uint32_t cumul_size = 0;
|
2010-05-10 10:08:57 +03:00
|
|
|
const uint8_t *buf_end = buf + buf_size;
|
2013-06-11 17:44:04 +03:00
|
|
|
int ret = 0;
|
2007-09-06 15:36:07 +03:00
|
|
|
|
|
|
|
/* nothing to filter */
|
|
|
|
if (!avctx->extradata || avctx->extradata_size < 6) {
|
2013-06-11 17:12:01 +03:00
|
|
|
*poutbuf = (uint8_t *)buf;
|
2007-09-06 15:36:07 +03:00
|
|
|
*poutbuf_size = buf_size;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* retrieve sps and pps NAL units from extradata */
|
2010-06-09 09:47:01 +03:00
|
|
|
if (!ctx->extradata_parsed) {
|
2013-06-11 17:44:04 +03:00
|
|
|
ret = h264_extradata_to_annexb(avctx, FF_INPUT_BUFFER_PADDING_SIZE);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
ctx->length_size = ret;
|
2010-06-09 09:47:01 +03:00
|
|
|
ctx->first_idr = 1;
|
|
|
|
ctx->extradata_parsed = 1;
|
2007-09-06 15:36:07 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
*poutbuf_size = 0;
|
2013-06-11 17:12:01 +03:00
|
|
|
*poutbuf = NULL;
|
2007-09-06 15:36:07 +03:00
|
|
|
do {
|
2011-12-29 05:42:15 +03:00
|
|
|
ret= AVERROR(EINVAL);
|
2010-05-10 10:08:57 +03:00
|
|
|
if (buf + ctx->length_size > buf_end)
|
|
|
|
goto fail;
|
|
|
|
|
2012-03-22 00:33:28 +03:00
|
|
|
for (nal_size = 0, i = 0; i<ctx->length_size; i++)
|
|
|
|
nal_size = (nal_size << 8) | buf[i];
|
2007-09-06 15:36:07 +03:00
|
|
|
|
2013-06-11 17:12:01 +03:00
|
|
|
buf += ctx->length_size;
|
2007-09-06 15:36:07 +03:00
|
|
|
unit_type = *buf & 0x1f;
|
|
|
|
|
2010-05-10 10:08:57 +03:00
|
|
|
if (buf + nal_size > buf_end || nal_size < 0)
|
|
|
|
goto fail;
|
|
|
|
|
2007-09-06 15:36:07 +03:00
|
|
|
/* prepend only to the first type 5 NAL unit of an IDR picture */
|
2014-03-26 20:09:23 +03:00
|
|
|
if (ctx->first_idr && (unit_type == 5 || unit_type == 7 || unit_type == 8)) {
|
2011-12-29 05:42:15 +03:00
|
|
|
if ((ret=alloc_and_copy(poutbuf, poutbuf_size,
|
2010-06-10 09:00:37 +03:00
|
|
|
avctx->extradata, avctx->extradata_size,
|
2011-12-29 05:42:15 +03:00
|
|
|
buf, nal_size)) < 0)
|
2010-06-10 08:59:22 +03:00
|
|
|
goto fail;
|
2007-09-06 15:36:07 +03:00
|
|
|
ctx->first_idr = 0;
|
2010-06-10 09:00:06 +03:00
|
|
|
} else {
|
2011-12-29 05:42:15 +03:00
|
|
|
if ((ret=alloc_and_copy(poutbuf, poutbuf_size,
|
2013-06-16 23:40:43 +03:00
|
|
|
NULL, 0, buf, nal_size)) < 0)
|
2010-06-10 08:59:22 +03:00
|
|
|
goto fail;
|
2007-09-06 15:36:07 +03:00
|
|
|
if (!ctx->first_idr && unit_type == 1)
|
|
|
|
ctx->first_idr = 1;
|
|
|
|
}
|
|
|
|
|
2013-06-11 17:12:01 +03:00
|
|
|
buf += nal_size;
|
2007-09-06 15:36:07 +03:00
|
|
|
cumul_size += nal_size + ctx->length_size;
|
|
|
|
} while (cumul_size < buf_size);
|
|
|
|
|
|
|
|
return 1;
|
2010-05-10 10:08:57 +03:00
|
|
|
|
|
|
|
fail:
|
|
|
|
av_freep(poutbuf);
|
|
|
|
*poutbuf_size = 0;
|
2011-12-29 05:42:15 +03:00
|
|
|
return ret;
|
2007-09-06 15:36:07 +03:00
|
|
|
}
|
|
|
|
|
2011-01-25 23:40:11 +02:00
|
|
|
AVBitStreamFilter ff_h264_mp4toannexb_bsf = {
|
2013-10-02 20:20:29 +03:00
|
|
|
.name = "h264_mp4toannexb",
|
|
|
|
.priv_data_size = sizeof(H264BSFContext),
|
|
|
|
.filter = h264_mp4toannexb_filter,
|
2007-09-06 15:36:07 +03:00
|
|
|
};
|