static int MP3lame_encode_frame(AVCodecContext *avctx, unsigned char *frame, int buf_size, void *data) { Mp3AudioContext *s = avctx->priv_data; int len; int lame_result; /* lame 3.91 dies on '1-channel interleaved' data */ if(data){ if (s->stereo) { lame_result = lame_encode_buffer_interleaved( s->gfp, data, avctx->frame_size, s->buffer + s->buffer_index, BUFFER_SIZE - s->buffer_index ); } else { lame_result = lame_encode_buffer( s->gfp, data, data, avctx->frame_size, s->buffer + s->buffer_index, BUFFER_SIZE - s->buffer_index ); } }else{ lame_result= lame_encode_flush( s->gfp, s->buffer + s->buffer_index, BUFFER_SIZE - s->buffer_index ); } if(lame_result==-1) { /* output buffer too small */ av_log(avctx, AV_LOG_ERROR, "lame: output buffer too small (buffer index: %d, free bytes: %d)\n", s->buffer_index, BUFFER_SIZE - s->buffer_index); return 0; } s->buffer_index += lame_result; if(s->buffer_index<4) return 0; len= mp3len(s->buffer, NULL, NULL); //av_log(avctx, AV_LOG_DEBUG, "in:%d packet-len:%d index:%d\n", avctx->frame_size, len, s->buffer_index); if(len <= s->buffer_index){ memcpy(frame, s->buffer, len); s->buffer_index -= len; memmove(s->buffer, s->buffer+len, s->buffer_index); //FIXME fix the audio codec API, so we do not need the memcpy() /*for(i=0; i<len; i++){ av_log(avctx, AV_LOG_DEBUG, "%2X ", frame[i]); }*/ return len; }else return 0; }