#include "avcodec.h"
typedef struct H264BSFContext {
+ int32_t sps_offset;
+ int32_t pps_offset;
uint8_t length_size;
uint8_t new_idr;
- uint8_t idr_sps_pps_seen;
+ uint8_t idr_sps_seen;
+ uint8_t idr_pps_seen;
int extradata_parsed;
} H264BSFContext;
return 0;
}
-static int h264_extradata_to_annexb(AVCodecContext *avctx, const int padding)
+static int h264_extradata_to_annexb(H264BSFContext *ctx, AVCodecContext *avctx, const int padding)
{
uint16_t unit_size;
uint64_t total_size = 0;
static const uint8_t nalu_header[4] = { 0, 0, 0, 1 };
int length_size = (*extradata++ & 0x3) + 1; // retrieve length coded size
+ ctx->sps_offset = ctx->pps_offset = -1;
+
/* retrieve sps and pps unit(s) */
unit_nb = *extradata++ & 0x1f; /* number of sps unit(s) */
if (!unit_nb) {
goto pps;
} else {
+ ctx->sps_offset = 0;
sps_seen = 1;
}
pps:
if (!unit_nb && !sps_done++) {
unit_nb = *extradata++; /* number of pps unit(s) */
- if (unit_nb)
+ if (unit_nb) {
+ ctx->pps_offset = (extradata - 1) - (avctx->extradata + 4);
pps_seen = 1;
+ }
}
}
/* retrieve sps and pps NAL units from extradata */
if (!ctx->extradata_parsed) {
- ret = h264_extradata_to_annexb(avctx, FF_INPUT_BUFFER_PADDING_SIZE);
+ ret = h264_extradata_to_annexb(ctx, avctx, FF_INPUT_BUFFER_PADDING_SIZE);
if (ret < 0)
return ret;
ctx->length_size = ret;
ctx->new_idr = 1;
- ctx->idr_sps_pps_seen = 0;
+ ctx->idr_sps_seen = 0;
+ ctx->idr_pps_seen = 0;
ctx->extradata_parsed = 1;
}
if (buf + nal_size > buf_end || nal_size < 0)
goto fail;
- if (unit_type == 7 || unit_type == 8)
- ctx->idr_sps_pps_seen = 1;
+ if (unit_type == 7)
+ ctx->idr_sps_seen = 1;
+ else if (unit_type == 8) {
+ ctx->idr_pps_seen = 1;
+ /* if SPS has not been seen yet, prepend the AVCC one to PPS */
+ if (!ctx->idr_sps_seen) {
+ if (ctx->sps_offset == -1)
+ av_log(avctx, AV_LOG_WARNING, "SPS not present in the stream, nor in AVCC, stream may be unreadable\n");
+ else {
+ if ((ret = alloc_and_copy(poutbuf, poutbuf_size,
+ avctx->extradata + ctx->sps_offset,
+ ctx->pps_offset != -1 ? ctx->pps_offset : avctx->extradata_size - ctx->sps_offset,
+ buf, nal_size)) < 0)
+ goto fail;
+ ctx->idr_sps_seen = 1;
+ goto next_nal;
+ }
+ }
+ }
/* if this is a new IDR picture following an IDR picture, reset the idr flag.
* Just check first_mb_in_slice to be 0 as this is the simplest solution.
ctx->new_idr = 1;
/* prepend only to the first type 5 NAL unit of an IDR picture, if no sps/pps are already present */
- if (ctx->new_idr && unit_type == 5 && !ctx->idr_sps_pps_seen) {
+ if (ctx->new_idr && unit_type == 5 && !ctx->idr_sps_seen && !ctx->idr_pps_seen) {
if ((ret=alloc_and_copy(poutbuf, poutbuf_size,
avctx->extradata, avctx->extradata_size,
buf, nal_size)) < 0)
goto fail;
ctx->new_idr = 0;
+ /* if only SPS has been seen, also insert PPS */
+ } else if (ctx->new_idr && unit_type == 5 && ctx->idr_sps_seen && !ctx->idr_pps_seen) {
+ if (ctx->pps_offset == -1) {
+ av_log(avctx, AV_LOG_WARNING, "PPS not present in the stream, nor in AVCC, stream may be unreadable\n");
+ if ((ret = alloc_and_copy(poutbuf, poutbuf_size,
+ NULL, 0, buf, nal_size)) < 0)
+ goto fail;
+ } else if ((ret = alloc_and_copy(poutbuf, poutbuf_size,
+ avctx->extradata + ctx->pps_offset, avctx->extradata_size - ctx->pps_offset,
+ buf, nal_size)) < 0)
+ goto fail;
} else {
if ((ret=alloc_and_copy(poutbuf, poutbuf_size,
NULL, 0, buf, nal_size)) < 0)
goto fail;
if (!ctx->new_idr && unit_type == 1) {
ctx->new_idr = 1;
- ctx->idr_sps_pps_seen = 0;
+ ctx->idr_sps_seen = 0;
+ ctx->idr_pps_seen = 0;
}
}
+next_nal:
buf += nal_size;
cumul_size += nal_size + ctx->length_size;
} while (cumul_size < buf_size);