From 54cc9247e0ff20068a6b937332ab88020bf6fbf2 Mon Sep 17 00:00:00 2001 From: nicodvb Date: Sat, 26 Jan 2008 18:42:17 +0000 Subject: [PATCH] added AudioSpecificConfigFromBitfile() -that reads from an initizialized bitstream- and reimplemented AudioSpecificConfig() in terms of the former. Also, introduced a short_form parameter that indicates if the core function must pretend not to know the size of the header (another craziness in AAC) git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@25863 b3059339-0415-0410-9bf9-f77b7e298cf2 --- libfaad2/decoder.c | 3 +- libfaad2/mp4.c | 71 ++++++++++++++++++++++++++-------------------- libfaad2/mp4.h | 5 +++- 3 files changed, 46 insertions(+), 33 deletions(-) diff --git a/libfaad2/decoder.c b/libfaad2/decoder.c index f7d699f785..7ff12b4982 100644 --- a/libfaad2/decoder.c +++ b/libfaad2/decoder.c @@ -106,6 +106,7 @@ NeAACDecHandle NEAACDECAPI NeAACDecOpen(void) hDecoder->config.downMatrix = 0; hDecoder->adts_header_present = 0; hDecoder->adif_header_present = 0; + hDecoder->latm_header_present = 0; #ifdef ERROR_RESILIENCE hDecoder->aacSectionDataResilienceFlag = 0; hDecoder->aacScalefactorDataResilienceFlag = 0; @@ -320,7 +321,7 @@ int8_t NEAACDECAPI NeAACDecInit2(NeAACDecHandle hDecoder, uint8_t *pBuffer, /* decode the audio specific config */ rc = AudioSpecificConfig2(pBuffer, SizeOfDecoderSpecificInfo, &mp4ASC, - &(hDecoder->pce)); + &(hDecoder->pce), hDecoder->latm_header_present); /* copy the relevant info to the decoder handle */ *samplerate = mp4ASC.samplingFrequency; diff --git a/libfaad2/mp4.c b/libfaad2/mp4.c index 85b1a32a97..0f11aad32a 100644 --- a/libfaad2/mp4.c +++ b/libfaad2/mp4.c @@ -123,56 +123,49 @@ int8_t NEAACDECAPI NeAACDecAudioSpecificConfig(uint8_t *pBuffer, uint32_t buffer_size, mp4AudioSpecificConfig *mp4ASC) { - return AudioSpecificConfig2(pBuffer, buffer_size, mp4ASC, NULL); + return AudioSpecificConfig2(pBuffer, buffer_size, mp4ASC, NULL, 0); } -int8_t AudioSpecificConfig2(uint8_t *pBuffer, - uint32_t buffer_size, +int8_t AudioSpecificConfigFromBitfile(bitfile *ld, mp4AudioSpecificConfig *mp4ASC, - program_config *pce) + program_config *pce, uint32_t buffer_size, uint8_t short_form) { - bitfile ld; int8_t result = 0; + uint32_t startpos = faad_get_processed_bits(ld); #ifdef SBR_DEC int8_t bits_to_decode = 0; #endif - if (pBuffer == NULL) - return -7; if (mp4ASC == NULL) return -8; memset(mp4ASC, 0, sizeof(mp4AudioSpecificConfig)); - faad_initbits(&ld, pBuffer, buffer_size); - faad_byte_align(&ld); - - mp4ASC->objectTypeIndex = (uint8_t)faad_getbits(&ld, 5 + mp4ASC->objectTypeIndex = (uint8_t)faad_getbits(ld, 5 DEBUGVAR(1,1,"parse_audio_decoder_specific_info(): ObjectTypeIndex")); - mp4ASC->samplingFrequencyIndex = (uint8_t)faad_getbits(&ld, 4 + mp4ASC->samplingFrequencyIndex = (uint8_t)faad_getbits(ld, 4 DEBUGVAR(1,2,"parse_audio_decoder_specific_info(): SamplingFrequencyIndex")); + if(mp4ASC->samplingFrequencyIndex==0x0f) + faad_getbits(ld, 24); - mp4ASC->channelsConfiguration = (uint8_t)faad_getbits(&ld, 4 + mp4ASC->channelsConfiguration = (uint8_t)faad_getbits(ld, 4 DEBUGVAR(1,3,"parse_audio_decoder_specific_info(): ChannelsConfiguration")); mp4ASC->samplingFrequency = get_sample_rate(mp4ASC->samplingFrequencyIndex); if (ObjectTypesTable[mp4ASC->objectTypeIndex] != 1) { - faad_endbits(&ld); return -1; } if (mp4ASC->samplingFrequency == 0) { - faad_endbits(&ld); return -2; } if (mp4ASC->channelsConfiguration > 7) { - faad_endbits(&ld); return -3; } @@ -192,7 +185,7 @@ int8_t AudioSpecificConfig2(uint8_t *pBuffer, uint8_t tmp; mp4ASC->sbr_present_flag = 1; - tmp = (uint8_t)faad_getbits(&ld, 4 + tmp = (uint8_t)faad_getbits(ld, 4 DEBUGVAR(1,5,"parse_audio_decoder_specific_info(): extensionSamplingFrequencyIndex")); /* check for downsampled SBR */ if (tmp == mp4ASC->samplingFrequencyIndex) @@ -200,12 +193,12 @@ int8_t AudioSpecificConfig2(uint8_t *pBuffer, mp4ASC->samplingFrequencyIndex = tmp; if (mp4ASC->samplingFrequencyIndex == 15) { - mp4ASC->samplingFrequency = (uint32_t)faad_getbits(&ld, 24 + mp4ASC->samplingFrequency = (uint32_t)faad_getbits(ld, 24 DEBUGVAR(1,6,"parse_audio_decoder_specific_info(): extensionSamplingFrequencyIndex")); } else { mp4ASC->samplingFrequency = get_sample_rate(mp4ASC->samplingFrequencyIndex); } - mp4ASC->objectTypeIndex = (uint8_t)faad_getbits(&ld, 5 + mp4ASC->objectTypeIndex = (uint8_t)faad_getbits(ld, 5 DEBUGVAR(1,7,"parse_audio_decoder_specific_info(): ObjectTypeIndex")); } #endif @@ -215,12 +208,12 @@ int8_t AudioSpecificConfig2(uint8_t *pBuffer, mp4ASC->objectTypeIndex == 3 || mp4ASC->objectTypeIndex == 4 || mp4ASC->objectTypeIndex == 6 || mp4ASC->objectTypeIndex == 7) { - result = GASpecificConfig(&ld, mp4ASC, pce); + result = GASpecificConfig(ld, mp4ASC, pce); #ifdef ERROR_RESILIENCE } else if (mp4ASC->objectTypeIndex >= ER_OBJECT_START) { /* ER */ - result = GASpecificConfig(&ld, mp4ASC, pce); - mp4ASC->epConfig = (uint8_t)faad_getbits(&ld, 2 + result = GASpecificConfig(ld, mp4ASC, pce); + mp4ASC->epConfig = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,143,"parse_audio_decoder_specific_info(): epConfig")); if (mp4ASC->epConfig != 0) @@ -239,27 +232,29 @@ int8_t AudioSpecificConfig2(uint8_t *pBuffer, #ifdef SBR_DEC - bits_to_decode = (int8_t)(buffer_size*8 - faad_get_processed_bits(&ld)); - + if(short_form) + bits_to_decode = 0; + else + bits_to_decode = (int8_t)(buffer_size*8 - (startpos-faad_get_processed_bits(ld))); if ((mp4ASC->objectTypeIndex != 5) && (bits_to_decode >= 16)) { - int16_t syncExtensionType = (int16_t)faad_getbits(&ld, 11 + int16_t syncExtensionType = (int16_t)faad_getbits(ld, 11 DEBUGVAR(1,9,"parse_audio_decoder_specific_info(): syncExtensionType")); if (syncExtensionType == 0x2b7) { - mp4ASC->objectTypeIndex = (uint8_t)faad_getbits(&ld, 5 + mp4ASC->objectTypeIndex = (uint8_t)faad_getbits(ld, 5 DEBUGVAR(1,10,"parse_audio_decoder_specific_info(): extensionAudioObjectType")); if (mp4ASC->objectTypeIndex == 5) { - mp4ASC->sbr_present_flag = (uint8_t)faad_get1bit(&ld + mp4ASC->sbr_present_flag = (uint8_t)faad_get1bit(ld DEBUGVAR(1,11,"parse_audio_decoder_specific_info(): sbr_present_flag")); if (mp4ASC->sbr_present_flag) { uint8_t tmp; - tmp = (uint8_t)faad_getbits(&ld, 4 + tmp = (uint8_t)faad_getbits(ld, 4 DEBUGVAR(1,12,"parse_audio_decoder_specific_info(): extensionSamplingFrequencyIndex")); /* check for downsampled SBR */ @@ -269,7 +264,7 @@ int8_t AudioSpecificConfig2(uint8_t *pBuffer, if (mp4ASC->samplingFrequencyIndex == 15) { - mp4ASC->samplingFrequency = (uint32_t)faad_getbits(&ld, 24 + mp4ASC->samplingFrequency = (uint32_t)faad_getbits(ld, 24 DEBUGVAR(1,13,"parse_audio_decoder_specific_info(): extensionSamplingFrequencyIndex")); } else { mp4ASC->samplingFrequency = get_sample_rate(mp4ASC->samplingFrequencyIndex); @@ -293,7 +288,21 @@ int8_t AudioSpecificConfig2(uint8_t *pBuffer, } #endif - faad_endbits(&ld); - return result; } + +int8_t AudioSpecificConfig2(uint8_t *pBuffer, + uint32_t buffer_size, + mp4AudioSpecificConfig *mp4ASC, + program_config *pce, + uint8_t short_form) +{ + uint8_t ret = 0; + bitfile ld; + faad_initbits(&ld, pBuffer, buffer_size); + faad_byte_align(&ld); + ret = AudioSpecificConfigFromBitfile(&ld, mp4ASC, pce, buffer_size, short_form); + faad_endbits(&ld); + return ret; +} + diff --git a/libfaad2/mp4.h b/libfaad2/mp4.h index c6f970bcd8..48882f7368 100644 --- a/libfaad2/mp4.h +++ b/libfaad2/mp4.h @@ -41,8 +41,11 @@ int8_t NEAACDECAPI NeAACDecAudioSpecificConfig(uint8_t *pBuffer, int8_t AudioSpecificConfig2(uint8_t *pBuffer, uint32_t buffer_size, mp4AudioSpecificConfig *mp4ASC, - program_config *pce); + program_config *pce, uint8_t short_form); +int8_t AudioSpecificConfigFromBitfile(bitfile *ld, + mp4AudioSpecificConfig *mp4ASC, + program_config *pce, uint32_t bsize, uint8_t short_form); #ifdef __cplusplus } #endif