// H.264 bitstream without start codes.
sp<MetaData> setAVCFormat(AVCodecContext *avctx)
{
ALOGV("AVC");
CHECK_EQ(avctx->codec_id, AV_CODEC_ID_H264);
CHECK_GT(avctx->extradata_size, 0);
CHECK_EQ(avctx->extradata[0], 1); //configurationVersion
if (avctx->width == 0 || avctx->height == 0) {
int32_t width, height;
sp<ABuffer> seqParamSet = new ABuffer(avctx->extradata_size - 8);
memcpy(seqParamSet->data(), avctx->extradata + 8, avctx->extradata_size - 8);
FindAVCDimensions(seqParamSet, &width, &height);
avctx->width = width;
avctx->height = height;
}
sp<MetaData> meta = new MetaData;
meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_AVC);
meta->setData(kKeyAVCC, kTypeAVCC, avctx->extradata, avctx->extradata_size);
return meta;
}
sp<MetaData> MakeAVCCodecSpecificData(const sp<ABuffer> &accessUnit) {
const uint8_t *data = accessUnit->data();
size_t size = accessUnit->size();
sp<ABuffer> seqParamSet = FindNAL(data, size, 7, NULL);
if (seqParamSet == NULL) {
return NULL;
}
int32_t width, height;
FindAVCDimensions(seqParamSet, &width, &height);
size_t stopOffset;
sp<ABuffer> picParamSet = FindNAL(data, size, 8, &stopOffset);
CHECK(picParamSet != NULL);
size_t csdSize =
1 + 3 + 1 + 1
+ 2 * 1 + seqParamSet->size()
+ 1 + 2 * 1 + picParamSet->size();
sp<ABuffer> csd = new ABuffer(csdSize);
uint8_t *out = csd->data();
*out++ = 0x01; // configurationVersion
memcpy(out, seqParamSet->data() + 1, 3); // profile/level...
uint8_t profile = out[0];
uint8_t level = out[2];
out += 3;
*out++ = (0x3f << 2) | 1; // lengthSize == 2 bytes
*out++ = 0xe0 | 1;
*out++ = seqParamSet->size() >> 8;
*out++ = seqParamSet->size() & 0xff;
memcpy(out, seqParamSet->data(), seqParamSet->size());
out += seqParamSet->size();
*out++ = 1;
*out++ = picParamSet->size() >> 8;
*out++ = picParamSet->size() & 0xff;
memcpy(out, picParamSet->data(), picParamSet->size());
#if 0
LOGI("AVC seq param set");
hexdump(seqParamSet->data(), seqParamSet->size());
#endif
sp<MetaData> meta = new MetaData;
meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_AVC);
meta->setData(kKeyAVCC, kTypeAVCC, csd->data(), csd->size());
meta->setInt32(kKeyWidth, width);
meta->setInt32(kKeyHeight, height);
LOGI("found AVC codec config (%d x %d, %s-profile level %d.%d)",
width, height, AVCProfileToString(profile), level / 10, level % 10);
return meta;
}
sp<ABuffer> MakeAVCCodecSpecificData(
const sp<ABuffer> &accessUnit, int32_t *width, int32_t *height,
int32_t *sarWidth, int32_t *sarHeight) {
const uint8_t *data = accessUnit->data();
size_t size = accessUnit->size();
sp<ABuffer> seqParamSet = FindNAL(data, size, 7);
if (seqParamSet == NULL) {
return NULL;
}
FindAVCDimensions(
seqParamSet, width, height, sarWidth, sarHeight);
sp<ABuffer> picParamSet = FindNAL(data, size, 8);
CHECK(picParamSet != NULL);
size_t csdSize =
1 + 3 + 1 + 1
+ 2 * 1 + seqParamSet->size()
+ 1 + 2 * 1 + picParamSet->size();
sp<ABuffer> csd = new ABuffer(csdSize);
uint8_t *out = csd->data();
*out++ = 0x01; // configurationVersion
memcpy(out, seqParamSet->data() + 1, 3); // profile/level...
uint8_t profile = out[0];
uint8_t level = out[2];
out += 3;
*out++ = (0x3f << 2) | 1; // lengthSize == 2 bytes
*out++ = 0xe0 | 1;
*out++ = seqParamSet->size() >> 8;
*out++ = seqParamSet->size() & 0xff;
memcpy(out, seqParamSet->data(), seqParamSet->size());
out += seqParamSet->size();
*out++ = 1;
*out++ = picParamSet->size() >> 8;
*out++ = picParamSet->size() & 0xff;
memcpy(out, picParamSet->data(), picParamSet->size());
#if 0
ALOGI("AVC seq param set");
hexdump(seqParamSet->data(), seqParamSet->size());
#endif
if (sarWidth != nullptr && sarHeight != nullptr) {
if ((*sarWidth > 0 && *sarHeight > 0) && (*sarWidth != 1 || *sarHeight != 1)) {
ALOGI("found AVC codec config (%d x %d, %s-profile level %d.%d) "
"SAR %d : %d",
*width,
*height,
AVCProfileToString(profile),
level / 10,
level % 10,
*sarWidth,
*sarHeight);
} else {
// We treat *:0 and 0:* (unspecified) as 1:1.
*sarWidth = 0;
*sarHeight = 0;
ALOGI("found AVC codec config (%d x %d, %s-profile level %d.%d)",
*width,
*height,
AVCProfileToString(profile),
level / 10,
level % 10);
}
}
return csd;
}
