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lavc/mediacodecdec_h264: properly convert extradata to annex-b

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H264ParamSets has its SPS/PPS stored raw (SODB) and needs to be
converted to NAL units before sending them to MediaCodec.

This patch adds the missing convertion of the SPS/PPS from SOBP to RBSP
which makes the resulting NAL units correct.

Fixes codec initialization on Nexus 4 and Nexus 7.
This commit is contained in:
Matthieu Bouron 2016-07-03 17:34:51 +02:00
parent 55ef890b29
commit 88d9c30cf5
1 changed files with 60 additions and 13 deletions
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73
libavcodec/mediacodecdec_h264.c
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@ -65,6 +65,58 @@ static av_cold int mediacodec_decode_close(AVCodecContext *avctx)
return 0;
}
static int h264_ps_to_nalu(const uint8_t *src, int src_size, uint8_t **out, int *out_size)
{
int i;
int ret = 0;
uint8_t *p = NULL;
static const uint8_t nalu_header[] = { 0x00, 0x00, 0x00, 0x01 };
if (!out || !out_size) {
return AVERROR(EINVAL);
}
p = av_malloc(sizeof(nalu_header) + src_size);
if (!p) {
return AVERROR(ENOMEM);
}
*out = p;
*out_size = sizeof(nalu_header) + src_size;
memcpy(p, nalu_header, sizeof(nalu_header));
memcpy(p + sizeof(nalu_header), src, src_size);
/* Escape 0x00, 0x00, 0x0{0-3} pattern */
for (i = 4; i < *out_size; i++) {
if (i < *out_size - 3 &&
p[i + 0] == 0 &&
p[i + 1] == 0 &&
p[i + 2] <= 3) {
uint8_t *new;
*out_size += 1;
new = av_realloc(*out, *out_size);
if (!new) {
ret = AVERROR(ENOMEM);
goto done;
}
*out = p = new;
i = i + 3;
memmove(p + i, p + i - 1, *out_size - i);
p[i - 1] = 0x03;
}
}
done:
if (ret < 0) {
av_freep(out);
*out_size = 0;
}
return ret;
}
static av_cold int mediacodec_decode_init(AVCodecContext *avctx)
{
int i;
@ -112,24 +164,19 @@ static av_cold int mediacodec_decode_init(AVCodecContext *avctx)
}
if (pps && sps) {
static const uint8_t nal_headers[] = { 0x00, 0x00, 0x00, 0x01 };
uint8_t *data = NULL;
size_t data_size = sizeof(nal_headers) + FFMAX(sps->data_size, pps->data_size);
size_t data_size = 0;
data = av_mallocz(data_size);
if (!data) {
ret = AVERROR(ENOMEM);
if ((ret = h264_ps_to_nalu(sps->data, sps->data_size, &data, &data_size)) < 0) {
goto done;
}
ff_AMediaFormat_setBuffer(format, "csd-0", (void*)data, data_size);
av_freep(&data);
memcpy(data, nal_headers, sizeof(nal_headers));
memcpy(data + sizeof(nal_headers), sps->data, sps->data_size);
ff_AMediaFormat_setBuffer(format, "csd-0", (void*)data, sizeof(nal_headers) + sps->data_size);
memcpy(data + sizeof(nal_headers), pps->data, pps->data_size);
ff_AMediaFormat_setBuffer(format, "csd-1", (void*)data, sizeof(nal_headers) + pps->data_size);
if ((ret = h264_ps_to_nalu(pps->data, pps->data_size, &data, &data_size)) < 0) {
goto done;
}
ff_AMediaFormat_setBuffer(format, "csd-1", (void*)data, data_size);
av_freep(&data);
} else {
av_log(avctx, AV_LOG_ERROR, "Could not extract PPS/SPS from extradata");