the program decodes ape,flac,mp3,mpc,tta,wma,wav are all right
except aac
and ogg. the code list below, which one can help me resolve it,
thanks.
compiled in vs2008.
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#include <mmsystem.h>
#pragma comment(lib, "winmm.lib")
#ifdef __cplusplus
extern "C" {
#endif
#include "./include/avcodec.h"
#include "./include/avformat.h"
#include "./include/avutil.h"
#include "./include/mem.h"
#ifdef __cplusplus
}
#endif
#define BLOCK_SIZE 4608
#define BLOCK_COUNT 20
HWAVEOUT hWaveOut = NULL;
static void CALLBACK waveOutProc(HWAVEOUT, UINT, DWORD, DWORD, DWORD);
static WAVEHDR* allocateBlocks(int size, int count);
static void freeBlocks(WAVEHDR* blockArray);
static void writeAudio(HWAVEOUT hWaveOut, LPSTR data, int size);
static CRITICAL_SECTION waveCriticalSection;
static WAVEHDR* waveBlocks;
static volatile unsigned int waveFreeBlockCount;
static int waveCurrentBlock;
typedef struct AudioState {
AVFormatContext* pFmtCtx;
AVCodecContext* pCodecCtx;
AVCodec* pCodec;
uint8_t audio_buf1[(AVCODEC_MAX_AUDIO_FRAME_SIZE * 3) / 2];
uint8_t* audio_buf;
unsigned int audio_buf_size;
int audio_buf_index;
AVPacket audio_pkt_temp;
AVPacket audio_pkt;
uint8_t* audio_pkt_data;
int audio_pkt_size;
int stream_index;
} AudioState;
int audio_decode_frame(AudioState* pState) {
AVPacket* pkt_temp = &pState->audio_pkt_temp;
AVPacket* pkt = &pState->audio_pkt;
AVCodecContext* dec= pState->pCodecCtx;
int len = 0, data_size = sizeof(pState->audio_buf1);
int err = 0;
for( ; ; ) {
while (pkt_temp->size > 0) {
data_size = sizeof(pState->audio_buf1);
len = avcodec_decode_audio3(dec, (int16_t*)pState->audio_buf1,
&data_size, pkt_temp);
if (len < 0) {
pkt_temp->size = 0;
break;
}
pkt_temp->data += len;
pkt_temp->size -= len;
if (data_size <= 0)
continue;
pState->audio_buf = pState->audio_buf1;
return data_size;
}
if (pkt->data)
av_free_packet(pkt);
if((err = av_read_frame(pState->pFmtCtx, pkt)) < 0)
return -1;
pkt_temp->data = pkt->data;
pkt_temp->size = pkt->size;
}
return -1;
}
int main(int argc, char* argv[]) {
int err = 0;
AudioState audio_state = {0};
unsigned int i = 0;
unsigned int ready = 0;
OPENFILENAME ofn = {0};
char filename[MAX_PATH];
WAVEFORMATEX wfx = {0};
uint8_t buffer[BLOCK_SIZE];
uint8_t* pbuffer = buffer;
AVInputFormat* iformat = NULL;
int audio_size = 0, data_size = 0;
int len = 0, len1 = 0, eof = 0, size = 0;
memset(&ofn, 0, sizeof(OPENFILENAME));
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = GetDesktopWindow();
ofn.lpstrFile = filename;
ofn.lpstrFile[0] = '\0';
ofn.nMaxFile = sizeof(filename) / sizeof(filename[0]);
ofn.lpstrFilter = _TEXT("All support
files\0*.aac;*.ape;*.flac;*.mp3;*.mp4;*.mpc;*.ogg;*.tta;*.wma;*.wav
\0");
ofn.nFilterIndex = 1;
ofn.lpstrFileTitle = NULL;
ofn.nMaxFileTitle = 0;
ofn.lpstrInitialDir = NULL;
ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;
if (GetOpenFileName(&ofn) == FALSE)
return 0;
av_register_all();
err = av_open_input_file(&audio_state.pFmtCtx, filename, NULL, 0,
NULL);
if(err < 0) {
printf("can not open file %s.\n", filename);
return -1;
}
err = av_find_stream_info(audio_state.pFmtCtx);
if(err < 0) {
printf("can not find stream info of file %s.\n", filename);
return -1;
}
for(i = 0; i < audio_state.pFmtCtx->nb_streams; i++) {
if(audio_state.pFmtCtx->streams[i]->codec->codec_type ==
CODEC_TYPE_AUDIO)
{
audio_state.pCodecCtx = audio_state.pFmtCtx->streams[i]->codec;
audio_state.stream_index = i;
ready = 1;
break;
}
}
if(!ready)
return -1;
audio_state.pCodec = avcodec_find_decoder(audio_state.pCodecCtx-
>codec_id);
if(!audio_state.pCodec || avcodec_open(audio_state.pCodecCtx,
audio_state.pCodec) < 0)
return -1;
wfx.nSamplesPerSec = audio_state.pCodecCtx->sample_rate;
switch(audio_state.pCodecCtx->sample_fmt)
{
case SAMPLE_FMT_U8:
wfx.wBitsPerSample = 8;
break;
case SAMPLE_FMT_S16:
wfx.wBitsPerSample = 16;
break;
case SAMPLE_FMT_S32:
wfx.wBitsPerSample = 32;
break;
case SAMPLE_FMT_FLT:
wfx.wBitsPerSample = sizeof(double) * 8;
break;
default:
wfx.wBitsPerSample = 0;
break;
}
wfx.nChannels = FFMIN(2, audio_state.pCodecCtx->channels);
wfx.cbSize = 0;
wfx.wFormatTag = WAVE_FORMAT_PCM;
wfx.nBlockAlign = (wfx.wBitsPerSample * wfx.nChannels) >> 3;
wfx.nAvgBytesPerSec = wfx.nBlockAlign * wfx.nSamplesPerSec;
waveBlocks = allocateBlocks(BLOCK_SIZE, BLOCK_COUNT);
waveFreeBlockCount = BLOCK_COUNT;
waveCurrentBlock = 0;
InitializeCriticalSection(&waveCriticalSection);
// open wave out device
if(waveOutOpen(&hWaveOut, WAVE_MAPPER, &wfx, (DWORD_PTR)waveOutProc,
(DWORD_PTR)&waveFreeBlockCount, CALLBACK_FUNCTION) !=
MMSYSERR_NOERROR) {
fprintf(stderr, "%s: unable to open wave mapper device\n", argv[0]);
ExitProcess(1);
}
// play loop
for( ; ; ) {
len = BLOCK_SIZE;
size = 0;
pbuffer = buffer;
if(eof)
break;
while(len > 0) {
if(audio_state.audio_buf_index >= (int)audio_state.audio_buf_size) {
audio_size = audio_decode_frame(&audio_state);
if(audio_size < 0) {
if(size > 0)
break;
eof = 1;
break;
}
audio_state.audio_buf_size = audio_size;
audio_state.audio_buf_index = 0;
}
len1 = audio_state.audio_buf_size - audio_state.audio_buf_index;
if(len1 > len)
len1 = len;
memcpy(pbuffer, (uint8_t *)audio_state.audio_buf +
audio_state.audio_buf_index, len1);
len -= len1;
pbuffer += len1;
size += len1;
audio_state.audio_buf_index += len1;
}
writeAudio(hWaveOut, (char*)buffer, size);
}
// wait for complete
for( ; ; ) {
if(waveFreeBlockCount >= BLOCK_COUNT)
break;
Sleep(10);
}
for(i = 0; i < waveFreeBlockCount; i++)
if(waveBlocks[i].dwFlags & WHDR_PREPARED)
waveOutUnprepareHeader(hWaveOut, &waveBlocks[i], sizeof(WAVEHDR));
DeleteCriticalSection(&waveCriticalSection);
freeBlocks(waveBlocks);
waveOutClose(hWaveOut);
avcodec_close(audio_state.pCodecCtx);
system("pause");
return 0;
}
static void writeAudio(HWAVEOUT hWaveOut, LPSTR data, int size)
{
WAVEHDR* current;
int remain;
current = &waveBlocks[waveCurrentBlock];
while(size > 0) {
/*
* first make sure the header we're going to use is unprepared
*/
if(current->dwFlags & WHDR_PREPARED)
waveOutUnprepareHeader(hWaveOut, current, sizeof(WAVEHDR));
if(size < (int)(BLOCK_SIZE - current->dwUser)) {
memcpy(current->lpData + current->dwUser, data, size);
current->dwUser += size;
break;
}
remain = BLOCK_SIZE - current->dwUser;
memcpy(current->lpData + current->dwUser, data, remain);
size -= remain;
data += remain;
current->dwBufferLength = BLOCK_SIZE;
waveOutPrepareHeader(hWaveOut, current, sizeof(WAVEHDR));
waveOutWrite(hWaveOut, current, sizeof(WAVEHDR));
EnterCriticalSection(&waveCriticalSection);
waveFreeBlockCount--;
LeaveCriticalSection(&waveCriticalSection);
/*
* wait for a block to become free
*/
while(!waveFreeBlockCount)
Sleep(10);
/*
* point to the next block
*/
waveCurrentBlock++;
waveCurrentBlock %= BLOCK_COUNT;
current = &waveBlocks[waveCurrentBlock];
current->dwUser = 0;
}
}
static WAVEHDR* allocateBlocks(int size, int count)
{
char* buffer;
int i;
WAVEHDR* blocks;
DWORD totalBufferSize = (size + sizeof(WAVEHDR)) * count;
/*
* allocate memory for the entire set in one go
*/
if((buffer = (char*)HeapAlloc(
GetProcessHeap(),
HEAP_ZERO_MEMORY,
totalBufferSize
)) == NULL) {
fprintf(stderr, "Memory allocation error\n");
ExitProcess(1);
}
/*
* and set up the pointers to each bit
*/
blocks = (WAVEHDR*)buffer;
buffer += sizeof(WAVEHDR) * count;
for(i = 0; i < count; i++) {
blocks[i].dwBufferLength = size;
blocks[i].lpData = buffer;
buffer += size;
}
return blocks;
}
static void freeBlocks(WAVEHDR* blockArray)
{
/*
* and this is why allocateBlocks works the way it does
*/
HeapFree(GetProcessHeap(), 0, blockArray);
}
static void CALLBACK waveOutProc(
HWAVEOUT hWaveOut,
UINT uMsg,
DWORD dwInstance,
DWORD dwParam1,
DWORD dwParam2
)
{
int* freeBlockCounter = (int*)dwInstance;
/*
* ignore calls that occur due to opening and closing the
* device.
*/
if(uMsg != WOM_DONE)
return;
EnterCriticalSection(&waveCriticalSection);
(*freeBlockCounter)++;
LeaveCriticalSection(&waveCriticalSection);
}
_______________________________________________
libav-user mailing list
[email protected]
https://lists.mplayerhq.hu/mailman/listinfo/libav-user
