|
|
|
@ -37,14 +37,40 @@ |
|
|
|
|
#define AUDIO_INBUF_SIZE 20480 |
|
|
|
|
#define AUDIO_REFILL_THRESH 4096 |
|
|
|
|
|
|
|
|
|
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, |
|
|
|
|
FILE *outfile) |
|
|
|
|
{ |
|
|
|
|
int len, got_frame; |
|
|
|
|
|
|
|
|
|
while (pkt->size > 0) { |
|
|
|
|
len = avcodec_decode_audio4(dec_ctx, frame, &got_frame, pkt); |
|
|
|
|
if (len < 0) { |
|
|
|
|
fprintf(stderr, "Error while decoding\n"); |
|
|
|
|
exit(1); |
|
|
|
|
} |
|
|
|
|
if (got_frame) { |
|
|
|
|
/* if a frame has been decoded, output it */ |
|
|
|
|
int data_size = av_samples_get_buffer_size(NULL, dec_ctx->channels, |
|
|
|
|
frame->nb_samples, |
|
|
|
|
dec_ctx->sample_fmt, 1); |
|
|
|
|
fwrite(frame->data[0], 1, data_size, outfile); |
|
|
|
|
} |
|
|
|
|
pkt->size -= len; |
|
|
|
|
pkt->data += len; |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
int main(int argc, char **argv) |
|
|
|
|
{ |
|
|
|
|
const char *outfilename, *filename; |
|
|
|
|
const AVCodec *codec; |
|
|
|
|
AVCodecContext *c= NULL; |
|
|
|
|
int len; |
|
|
|
|
AVCodecParserContext *parser = NULL; |
|
|
|
|
int len, ret; |
|
|
|
|
FILE *f, *outfile; |
|
|
|
|
uint8_t inbuf[AUDIO_INBUF_SIZE + AV_INPUT_BUFFER_PADDING_SIZE]; |
|
|
|
|
uint8_t *data; |
|
|
|
|
size_t data_size; |
|
|
|
|
AVPacket avpkt; |
|
|
|
|
AVFrame *decoded_frame = NULL; |
|
|
|
|
|
|
|
|
@ -67,6 +93,12 @@ int main(int argc, char **argv) |
|
|
|
|
exit(1); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
parser = av_parser_init(codec->id); |
|
|
|
|
if (!parser) { |
|
|
|
|
fprintf(stderr, "parser not found\n"); |
|
|
|
|
exit(1); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
c = avcodec_alloc_context3(codec); |
|
|
|
|
|
|
|
|
|
/* open it */ |
|
|
|
@ -87,12 +119,10 @@ int main(int argc, char **argv) |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/* decode until eof */ |
|
|
|
|
avpkt.data = inbuf; |
|
|
|
|
avpkt.size = fread(inbuf, 1, AUDIO_INBUF_SIZE, f); |
|
|
|
|
|
|
|
|
|
while (avpkt.size > 0) { |
|
|
|
|
int got_frame = 0; |
|
|
|
|
data = inbuf; |
|
|
|
|
data_size = fread(inbuf, 1, AUDIO_INBUF_SIZE, f); |
|
|
|
|
|
|
|
|
|
while (data_size > 0) { |
|
|
|
|
if (!decoded_frame) { |
|
|
|
|
if (!(decoded_frame = av_frame_alloc())) { |
|
|
|
|
fprintf(stderr, "out of memory\n"); |
|
|
|
@ -100,31 +130,26 @@ int main(int argc, char **argv) |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
len = avcodec_decode_audio4(c, decoded_frame, &got_frame, &avpkt); |
|
|
|
|
if (len < 0) { |
|
|
|
|
fprintf(stderr, "Error while decoding\n"); |
|
|
|
|
ret = av_parser_parse2(parser, c, &avpkt.data, &avpkt.size, |
|
|
|
|
data, data_size, |
|
|
|
|
AV_NOPTS_VALUE, AV_NOPTS_VALUE, 0); |
|
|
|
|
if (ret < 0) { |
|
|
|
|
fprintf(stderr, "Error while parsing\n"); |
|
|
|
|
exit(1); |
|
|
|
|
} |
|
|
|
|
if (got_frame) { |
|
|
|
|
/* if a frame has been decoded, output it */ |
|
|
|
|
int data_size = av_samples_get_buffer_size(NULL, c->channels, |
|
|
|
|
decoded_frame->nb_samples, |
|
|
|
|
c->sample_fmt, 1); |
|
|
|
|
fwrite(decoded_frame->data[0], 1, data_size, outfile); |
|
|
|
|
} |
|
|
|
|
avpkt.size -= len; |
|
|
|
|
avpkt.data += len; |
|
|
|
|
if (avpkt.size < AUDIO_REFILL_THRESH) { |
|
|
|
|
/* Refill the input buffer, to avoid trying to decode
|
|
|
|
|
* incomplete frames. Instead of this, one could also use |
|
|
|
|
* a parser, or use a proper container format through |
|
|
|
|
* libavformat. */ |
|
|
|
|
memmove(inbuf, avpkt.data, avpkt.size); |
|
|
|
|
avpkt.data = inbuf; |
|
|
|
|
len = fread(avpkt.data + avpkt.size, 1, |
|
|
|
|
AUDIO_INBUF_SIZE - avpkt.size, f); |
|
|
|
|
data += ret; |
|
|
|
|
data_size -= ret; |
|
|
|
|
|
|
|
|
|
if (avpkt.size) |
|
|
|
|
decode(c, &avpkt, decoded_frame, outfile); |
|
|
|
|
|
|
|
|
|
if (data_size < AUDIO_REFILL_THRESH) { |
|
|
|
|
memmove(inbuf, data, data_size); |
|
|
|
|
data = inbuf; |
|
|
|
|
len = fread(data + data_size, 1, |
|
|
|
|
AUDIO_INBUF_SIZE - data_size, f); |
|
|
|
|
if (len > 0) |
|
|
|
|
avpkt.size += len; |
|
|
|
|
data_size += len; |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
@ -132,6 +157,7 @@ int main(int argc, char **argv) |
|
|
|
|
fclose(f); |
|
|
|
|
|
|
|
|
|
avcodec_free_context(&c); |
|
|
|
|
av_parser_close(parser); |
|
|
|
|
av_frame_free(&decoded_frame); |
|
|
|
|
|
|
|
|
|
return 0; |
|
|
|
|