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#include "h264_flv_decoder.h"
#include "../Winamp/wa_ipc.h" // for YV12_PLANES
#include <Mferror.h>
int FLVDecoderCreator::CreateVideoDecoder(int format_type, int width, int height, ifc_flvvideodecoder **decoder)
{
if (format_type == FLV::VIDEO_FORMAT_AVC)
{
MFTDecoder *ctx = new MFTDecoder();
if (!ctx || FAILED(ctx->Open())) {
delete ctx;
return CREATEDECODER_FAILURE;
}
*decoder = new FLVH264(ctx);
return CREATEDECODER_SUCCESS;
}
return CREATEDECODER_NOT_MINE;
}
int FLVDecoderCreator::HandlesVideo(int format_type)
{
if (format_type == FLV::VIDEO_FORMAT_AVC)
{
return CREATEDECODER_SUCCESS;
}
return CREATEDECODER_NOT_MINE;
}
#define CBCLASS FLVDecoderCreator
START_DISPATCH;
CB(CREATE_VIDEO_DECODER, CreateVideoDecoder)
CB(HANDLES_VIDEO, HandlesVideo)
END_DISPATCH;
#undef CBCLASS
/* --- */
uint32_t GetNALUSize(uint64_t nalu_size_bytes, const uint8_t *h264_data, size_t data_len);
uint32_t Read24(const uint8_t *data);
FLVH264::FLVH264(MFTDecoder *decoder) : decoder(decoder)
{
sequence_headers_parsed=0;
nalu_size_bytes=0;
}
FLVH264::~FLVH264()
{
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 FLVH264::GetOutputFormat(int *x, int *y, int *color_format)
{
UINT width, height;
bool local_flip=false;
double aspect_ratio;
if (SUCCEEDED(decoder->GetOutputFormat(&width, &height, &local_flip, &aspect_ratio))) {
*x = width;
*y = height;
*color_format = '21VY';
return FLV_VIDEO_SUCCESS;
}
return FLV_VIDEO_FAILURE;
}
int FLVH264::DecodeSample(const void *inputBuffer, size_t inputBufferBytes, int32_t timestamp)
{
const uint8_t *h264_data = (const uint8_t *)inputBuffer;
if (*h264_data == 0 && inputBufferBytes >= 10) // sequence headers
{
h264_data++; // skip packet type
uint32_t timestamp_offset = Read24(h264_data);
h264_data+=3;
inputBufferBytes -=4;
h264_data+=4; // don't care about level & profile
inputBufferBytes -=4;
nalu_size_bytes = (*h264_data++ & 0x3)+1;
inputBufferBytes--;
size_t num_sps = *h264_data++ & 0x1F;
inputBufferBytes--;
for (size_t i=0;i!=num_sps;i++)
{
if (inputBufferBytes > 2)
{
uint16_t sps_size = (h264_data[0] << 8) | h264_data[1];
h264_data+=2;
inputBufferBytes-=2;
//H264_ProcessSPS(decoder, h264_data+1, sps_size);
if (inputBufferBytes >= sps_size)
{
decoder->Feed(h264_data, sps_size, timestamp+timestamp_offset);
h264_data+=sps_size;
inputBufferBytes-=sps_size;
}
}
}
if (inputBufferBytes)
{
size_t num_pps = *h264_data++;
inputBufferBytes--;
for (size_t i=0;i!=num_pps;i++)
{
if (inputBufferBytes > 2)
{
uint16_t sps_size = (h264_data[0] << 8) | h264_data[1];
h264_data+=2;
inputBufferBytes-=2;
//H264_ProcessPPS(decoder, h264_data+1, sps_size);
if (inputBufferBytes >= sps_size)
{
decoder->Feed(h264_data, sps_size, timestamp+timestamp_offset);
h264_data+=sps_size;
inputBufferBytes-=sps_size;
}
}
}
}
sequence_headers_parsed=1;
}
else if (*h264_data == 1) // frame
{
h264_data++;
inputBufferBytes--;
if (inputBufferBytes < 3)
return FLV_VIDEO_FAILURE;
uint32_t timestamp_offset = Read24(h264_data);
h264_data+=3;
inputBufferBytes-=3;
while (inputBufferBytes)
{
uint32_t this_size =GetNALUSize(nalu_size_bytes, h264_data, inputBufferBytes);
if (this_size == 0)
return FLV_VIDEO_FAILURE;
inputBufferBytes-=nalu_size_bytes;
h264_data+=nalu_size_bytes;
if (this_size > inputBufferBytes)
return FLV_VIDEO_FAILURE;
for (;;) {
HRESULT hr = decoder->Feed(h264_data, this_size, timestamp+timestamp_offset);
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 FLV_VIDEO_FAILURE;
} else {
break;
}
}
inputBufferBytes-=this_size;
h264_data+=this_size;
}
}
return FLV_VIDEO_SUCCESS;
}
void FLVH264::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);
}
decoder->Flush();
}
void FLVH264::Close()
{
delete this;
}
int FLVH264::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 FLV_VIDEO_SUCCESS;
}
if (SUCCEEDED(decoder->GetFrame((YV12_PLANES **)data, decoder_data, timestamp))) {
return FLV_VIDEO_SUCCESS;
} else {
return FLV_VIDEO_FAILURE;
}
}
void FLVH264::FreePicture(void *data, void *decoder_data)
{
decoder->FreeFrame((YV12_PLANES *)data, decoder_data);
}
int FLVH264::Ready()
{
return sequence_headers_parsed;
}
#define CBCLASS FLVH264
START_DISPATCH;
CB(FLV_VIDEO_GETOUTPUTFORMAT, GetOutputFormat)
CB(FLV_VIDEO_DECODE, DecodeSample)
VCB(FLV_VIDEO_FLUSH, Flush)
VCB(FLV_VIDEO_CLOSE, Close)
CB(FLV_VIDEO_GET_PICTURE, GetPicture)
VCB(FLV_VIDEO_FREE_PICTURE, FreePicture)
CB(FLV_VIDEO_READY, Ready)
END_DISPATCH;
#undef CBCLASS
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