diff options
Diffstat (limited to 'libAACenc/src/aacenc.cpp')
| -rw-r--r-- | libAACenc/src/aacenc.cpp | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/libAACenc/src/aacenc.cpp b/libAACenc/src/aacenc.cpp index 1af8a2e..42755ab 100644 --- a/libAACenc/src/aacenc.cpp +++ b/libAACenc/src/aacenc.cpp @@ -188,6 +188,7 @@ INT FDKaacEnc_LimitBitrate(HANDLE_TRANSPORTENC hTpEnc, AUDIO_OBJECT_TYPE aot, } while (prevBitRate != bitRate && iter++ < 3); + //fprintf(stderr, "FDKaacEnc_LimitBitrate(): bitRate=%d\n", bitRate); return bitRate; } @@ -472,6 +473,36 @@ AAC_ENCODER_ERROR FDKaacEnc_Initialize( return AAC_ENC_UNSUPPORTED_BITRATE; } + INT superframe_size = 110*8*(config->bitRate/8000); + INT frames_per_superframe = 6; + INT staticBits = 0; + if((config->syntaxFlags & AC_DAB) && hTpEnc) { + staticBits = transportEnc_GetStaticBits(hTpEnc, 0); + switch(config->sampleRate) { + case 48000: + frames_per_superframe=6; + break; + case 32000: + frames_per_superframe=4; + break; + case 24000: + frames_per_superframe=3; + break; + case 16000: + frames_per_superframe=2; + break; + } + + //config->nSubFrames = frames_per_superframe; + //fprintf(stderr, "DAB+ superframe size=%d\n", superframe_size); + config->bitRate = (superframe_size - 16*(frames_per_superframe-1) - staticBits) * 1000/120; + //fprintf(stderr, "DAB+ tuned bitrate=%d\n", config->bitRate); + config->maxBitsPerFrame = (superframe_size - 16*(frames_per_superframe-1) - staticBits) / frames_per_superframe; + config->maxBitsPerFrame += 7; /*padding*/ + //config->bitreservoir=(superframe_size - 16*(frames_per_superframe-1) - staticBits - 2*8)/frames_per_superframe; + //fprintf(stderr, "DAB+ tuned maxBitsPerFrame=%d\n", (superframe_size - 16*(frames_per_superframe-1) - staticBits)/frames_per_superframe); + } + /* check bit rate */ if (FDKaacEnc_LimitBitrate( @@ -495,6 +526,7 @@ AAC_ENCODER_ERROR FDKaacEnc_Initialize( /* check frame length */ switch (config->framelength) { case 1024: + case 960: if (isLowDelay(config->audioObjectType)) { return AAC_ENC_INVALID_FRAME_LENGTH; } |