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#include "h264_mkv_decoder.h"
#include "../Winamp/wa_ipc.h" // for YV12_PLANES
#include <winsock.h>
#include <mmsystem.h>
#include <Mferror.h>
int MKVDecoderCreator::CreateVideoDecoder(const char *codec_id, const nsmkv::TrackEntryData *track_entry_data, const nsmkv::VideoData *video_data, ifc_mkvvideodecoder **decoder)
{
if (!strcmp(codec_id, "V_MPEG4/ISO/AVC"))
{
const uint8_t *init_data = (const uint8_t *)track_entry_data->codec_private;
size_t init_data_len = track_entry_data->codec_private_len;
if (init_data && init_data_len >= 6)
{
MFTDecoder *ctx = new MFTDecoder;
if (!ctx)
return CREATEDECODER_FAILURE;
if (FAILED(ctx->Open())) {
delete ctx;
return CREATEDECODER_FAILURE;
}
init_data+=4; // don't care about level & profile
init_data_len-=4;
// read NALU header size length
uint8_t nalu_minus_one = *init_data++ & 0x3;
init_data_len--;
// number of SPS NAL units
uint8_t num_sps = *init_data++ & 0x1F;
init_data_len--;
for (uint8_t i=0;i!=num_sps;i++)
{
if (init_data_len < 2)
{
delete ctx;
return CREATEDECODER_FAILURE;
}
uint16_t *s = (uint16_t *)init_data;
uint16_t sps_size = htons(*s);
init_data+=2;
init_data_len-=2;
if (init_data_len < sps_size)
{
delete ctx;
return CREATEDECODER_FAILURE;
}
ctx->Feed(init_data, sps_size, 0);
init_data+=sps_size;
init_data_len-=sps_size;
}
// read PPS NAL units
if (init_data_len)
{
// number of PPS NAL units
uint8_t num_pps = *init_data++ & 0x1F;
init_data_len--;
for (uint8_t i=0;i!=num_pps;i++)
{
if (init_data_len < 2)
{
delete ctx;
return CREATEDECODER_FAILURE;
}
uint16_t *s = (uint16_t *)init_data;
uint16_t pps_size = htons(*s);
init_data+=2;
init_data_len-=2;
if (init_data_len < pps_size)
{
delete ctx;
return CREATEDECODER_FAILURE;
}
ctx->Feed(init_data, pps_size, 0);
init_data+=pps_size;
init_data_len-=pps_size;
}
}
// if we made it here, we should be good
*decoder = new MKVH264(ctx, nalu_minus_one, video_data);
return CREATEDECODER_SUCCESS;
}
else
{
return CREATEDECODER_FAILURE;
}
}
else
{
return CREATEDECODER_NOT_MINE;
}
}
#define CBCLASS MKVDecoderCreator
START_DISPATCH;
CB(CREATE_VIDEO_DECODER, CreateVideoDecoder)
END_DISPATCH;
#undef CBCLASS
MKVH264::MKVH264(MFTDecoder *ctx, uint8_t nalu_minus_one, const nsmkv::VideoData *video_data) : decoder(ctx), video_data(video_data)
{
nalu_size = nalu_minus_one + 1;
width=0;
height=0;
}
MKVH264::~MKVH264()
{
for (size_t i=0;i<buffered_frames.size();i++) {
nullsoft_h264_frame_data frame_data = buffered_frames[i];
decoder->FreeFrame((YV12_PLANES *)frame_data.data, frame_data.decoder_data);
}
delete decoder;
}
int MKVH264::GetOutputProperties(int *x, int *y, int *color_format, double *aspect_ratio)
{
if (decoder) {
bool flip;
if (SUCCEEDED(decoder->GetOutputFormat(&width, &height, &flip, aspect_ratio))) {
*x = width;
*y = height;
*color_format = htonl('YV12');
return MKV_SUCCESS;
}
}
return MKV_FAILURE;
}
uint32_t GetNALUSize(uint64_t nalu_size_bytes, const uint8_t *h264_data, size_t data_len);
int MKVH264::DecodeBlock(const void *inputBuffer, size_t inputBufferBytes, uint64_t timestamp)
{
const uint8_t *h264_data = (const uint8_t *)inputBuffer;
while (inputBufferBytes) {
uint32_t this_size = GetNALUSize(nalu_size, h264_data, inputBufferBytes);
if (this_size == 0)
return MKV_FAILURE;
inputBufferBytes-=nalu_size;
h264_data+=nalu_size;
if (this_size > inputBufferBytes)
return MKV_FAILURE;
for (;;) {
HRESULT hr = decoder->Feed(h264_data, this_size, timestamp);
if (hr == MF_E_NOTACCEPTING) {
nullsoft_h264_frame_data frame_data;
if (FAILED(decoder->GetFrame((YV12_PLANES **)&frame_data.data, &frame_data.decoder_data, &frame_data.local_timestamp))) {
continue;
}
buffered_frames.push_back(frame_data);
} else if (FAILED(hr)) {
return MKV_FAILURE;
} else {
break;
}
}
inputBufferBytes-=this_size;
h264_data+=this_size;
}
return MKV_SUCCESS;
}
void MKVH264::Flush()
{
for (size_t i=0;i<buffered_frames.size();i++) {
nullsoft_h264_frame_data frame_data = buffered_frames[i];
decoder->FreeFrame((YV12_PLANES *)frame_data.data, frame_data.decoder_data);
}
if (decoder) {
decoder->Flush();
}
}
int MKVH264::GetPicture(void **data, void **decoder_data, uint64_t *timestamp)
{
if (!buffered_frames.empty()) {
nullsoft_h264_frame_data frame_data = buffered_frames[0];
buffered_frames.erase(buffered_frames.begin());
*data = frame_data.data;
*decoder_data = frame_data.decoder_data;
*timestamp = frame_data.local_timestamp;
return MKV_SUCCESS;
}
if (SUCCEEDED(decoder->GetFrame((YV12_PLANES **)data, decoder_data, timestamp))) {
return MKV_SUCCESS;
} else {
return MKV_FAILURE;
}
}
void MKVH264::FreePicture(void *data, void *decoder_data)
{
decoder->FreeFrame((YV12_PLANES *)data, decoder_data);
}
void MKVH264::EndOfStream()
{
if (decoder) {
decoder->Drain();
}
}
void MKVH264::HurryUp(int state)
{
// TODO(benski)
//if (decoder)
// H264_HurryUp(decoder, state);
}
void MKVH264::Close()
{
delete this;
}
#define CBCLASS MKVH264
START_DISPATCH;
CB(GET_OUTPUT_PROPERTIES, GetOutputProperties)
CB(DECODE_BLOCK, DecodeBlock)
VCB(FLUSH, Flush)
VCB(CLOSE, Close)
CB(GET_PICTURE, GetPicture)
VCB(FREE_PICTURE, FreePicture)
VCB(END_OF_STREAM, EndOfStream)
VCB(HURRY_UP, HurryUp)
END_DISPATCH;
#undef CBCLASS
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