diff options
Diffstat (limited to 'libfaad2/decoder.c')
| -rw-r--r-- | libfaad2/decoder.c | 327 |
1 files changed, 214 insertions, 113 deletions
diff --git a/libfaad2/decoder.c b/libfaad2/decoder.c index ee1bba71d3..866239d010 100644 --- a/libfaad2/decoder.c +++ b/libfaad2/decoder.c @@ -22,7 +22,7 @@ ** Commercial non-GPL licensing of this software is possible. ** For more info contact Ahead Software through Mpeg4AAClicense@nero.com. ** -** $Id: decoder.c,v 1.62 2003/07/29 08:20:12 menno Exp $ +** $Id: decoder.c,v 1.1 2003/08/30 22:30:21 arpi Exp $ **/ #include "common.h" @@ -34,7 +34,6 @@ #include "decoder.h" #include "mp4.h" #include "syntax.h" -#include "specrec.h" #include "tns.h" #include "pns.h" #include "is.h" @@ -146,6 +145,12 @@ faacDecHandle FAADAPI faacDecOpen() #if POW_TABLE_SIZE hDecoder->pow2_table = (real_t*)malloc(POW_TABLE_SIZE*sizeof(real_t)); + if (!hDecoder->pow2_table) + { + free(hDecoder); + hDecoder = NULL; + return hDecoder; + } build_tables(hDecoder->pow2_table); #endif @@ -154,21 +159,44 @@ faacDecHandle FAADAPI faacDecOpen() faacDecConfigurationPtr FAADAPI faacDecGetCurrentConfiguration(faacDecHandle hDecoder) { + if (hDecoder) + { faacDecConfigurationPtr config = &(hDecoder->config); return config; + } + + return NULL; } uint8_t FAADAPI faacDecSetConfiguration(faacDecHandle hDecoder, faacDecConfigurationPtr config) { + if (hDecoder && config) + { + /* check if we can decode this object type */ + if (can_decode_ot(config->defObjectType) < 0) + return 0; hDecoder->config.defObjectType = config->defObjectType; + + /* samplerate: anything but 0 should be possible */ + if (config->defSampleRate == 0) + return 0; hDecoder->config.defSampleRate = config->defSampleRate; + + /* check output format */ + if ((config->outputFormat < 1) || (config->outputFormat > 9)) + return 0; hDecoder->config.outputFormat = config->outputFormat; + + if (config->downMatrix > 1) hDecoder->config.downMatrix = config->downMatrix; /* OK */ return 1; + } + + return 0; } int32_t FAADAPI faacDecInit(faacDecHandle hDecoder, uint8_t *buffer, @@ -180,9 +208,12 @@ int32_t FAADAPI faacDecInit(faacDecHandle hDecoder, uint8_t *buffer, adif_header adif; adts_header adts; + if ((hDecoder == NULL) || (samplerate == NULL) || (channels == NULL)) + return -1; + hDecoder->sf_index = get_sr_index(hDecoder->config.defSampleRate); hDecoder->object_type = hDecoder->config.defObjectType; - *samplerate = sample_rates[hDecoder->sf_index]; + *samplerate = get_sample_rate(hDecoder->sf_index); *channels = 1; if (buffer != NULL) @@ -199,9 +230,9 @@ int32_t FAADAPI faacDecInit(faacDecHandle hDecoder, uint8_t *buffer, faad_byte_align(&ld); hDecoder->sf_index = adif.pce[0].sf_index; - hDecoder->object_type = adif.pce[0].object_type; + hDecoder->object_type = adif.pce[0].object_type + 1; - *samplerate = sample_rates[hDecoder->sf_index]; + *samplerate = get_sample_rate(hDecoder->sf_index); *channels = adif.pce[0].channels; memcpy(&(hDecoder->pce), &(adif.pce[0]), sizeof(program_config)); @@ -213,12 +244,13 @@ int32_t FAADAPI faacDecInit(faacDecHandle hDecoder, uint8_t *buffer, } else if (faad_showbits(&ld, 12) == 0xfff) { hDecoder->adts_header_present = 1; + adts.old_format = hDecoder->config.useOldADTSFormat; adts_frame(&adts, &ld); hDecoder->sf_index = adts.sf_index; - hDecoder->object_type = adts.profile; + hDecoder->object_type = adts.profile + 1; - *samplerate = sample_rates[hDecoder->sf_index]; + *samplerate = get_sample_rate(hDecoder->sf_index); *channels = (adts.channel_configuration > 6) ? 2 : adts.channel_configuration; } @@ -232,6 +264,15 @@ int32_t FAADAPI faacDecInit(faacDecHandle hDecoder, uint8_t *buffer, } hDecoder->channelConfiguration = *channels; +#ifdef SBR_DEC + /* implicit signalling */ + if (*samplerate <= 24000) + { + *samplerate *= 2; + hDecoder->forceUpSampling = 1; + } +#endif + /* must be done before frameLength is divided by 2 for LD */ #ifdef SSR_DEC if (hDecoder->object_type == SSR) @@ -250,7 +291,7 @@ int32_t FAADAPI faacDecInit(faacDecHandle hDecoder, uint8_t *buffer, #ifndef FIXED_POINT if (hDecoder->config.outputFormat >= FAAD_FMT_DITHER_LOWEST) - Init_Dither(16, hDecoder->config.outputFormat - FAAD_FMT_DITHER_LOWEST); + Init_Dither(16, (uint8_t)(hDecoder->config.outputFormat - FAAD_FMT_DITHER_LOWEST)); #endif return bits; @@ -264,9 +305,6 @@ int8_t FAADAPI faacDecInit2(faacDecHandle hDecoder, uint8_t *pBuffer, int8_t rc; mp4AudioSpecificConfig mp4ASC; - hDecoder->adif_header_present = 0; - hDecoder->adts_header_present = 0; - if((hDecoder == NULL) || (pBuffer == NULL) || (SizeOfDecoderSpecificInfo < 2) @@ -276,6 +314,9 @@ int8_t FAADAPI faacDecInit2(faacDecHandle hDecoder, uint8_t *pBuffer, return -1; } + hDecoder->adif_header_present = 0; + hDecoder->adts_header_present = 0; + /* decode the audio specific config */ rc = AudioSpecificConfig2(pBuffer, SizeOfDecoderSpecificInfo, &mp4ASC, &(hDecoder->pce)); @@ -291,21 +332,22 @@ int8_t FAADAPI faacDecInit2(faacDecHandle hDecoder, uint8_t *pBuffer, } hDecoder->sf_index = mp4ASC.samplingFrequencyIndex; hDecoder->object_type = mp4ASC.objectTypeIndex; +#ifdef ERROR_RESILIENCE hDecoder->aacSectionDataResilienceFlag = mp4ASC.aacSectionDataResilienceFlag; hDecoder->aacScalefactorDataResilienceFlag = mp4ASC.aacScalefactorDataResilienceFlag; hDecoder->aacSpectralDataResilienceFlag = mp4ASC.aacSpectralDataResilienceFlag; +#endif #ifdef SBR_DEC hDecoder->sbr_present_flag = mp4ASC.sbr_present_flag; + hDecoder->forceUpSampling = mp4ASC.forceUpSampling; /* AAC core decoder samplerate is 2 times as low */ - if (hDecoder->sbr_present_flag == 1) + if (hDecoder->sbr_present_flag == 1 || hDecoder->forceUpSampling == 1) { hDecoder->sf_index = get_sr_index(mp4ASC.samplingFrequency / 2); } #endif - if (hDecoder->object_type < 5) - hDecoder->object_type--; /* For AAC differs from MPEG-4 */ if (rc != 0) { return rc; @@ -329,7 +371,7 @@ int8_t FAADAPI faacDecInit2(faacDecHandle hDecoder, uint8_t *pBuffer, #ifndef FIXED_POINT if (hDecoder->config.outputFormat >= FAAD_FMT_DITHER_LOWEST) - Init_Dither(16, hDecoder->config.outputFormat - FAAD_FMT_DITHER_LOWEST); + Init_Dither(16, (uint8_t)(hDecoder->config.outputFormat - FAAD_FMT_DITHER_LOWEST)); #endif return 0; @@ -342,20 +384,44 @@ int8_t FAADAPI faacDecInitDRM(faacDecHandle hDecoder, uint32_t samplerate, hDecoder->config.defObjectType = DRM_ER_LC; hDecoder->config.defSampleRate = samplerate; +#ifdef ERROR_RESILIENCE // This shoudl always be defined for DRM hDecoder->aacSectionDataResilienceFlag = 1; /* VCB11 */ hDecoder->aacScalefactorDataResilienceFlag = 0; /* no RVLC */ hDecoder->aacSpectralDataResilienceFlag = 1; /* HCR */ +#endif hDecoder->frameLength = 960; hDecoder->sf_index = get_sr_index(hDecoder->config.defSampleRate); hDecoder->object_type = hDecoder->config.defObjectType; - hDecoder->channelConfiguration = channels; + + if ((channels == DRMCH_STEREO) || (channels == DRMCH_SBR_STEREO)) + hDecoder->channelConfiguration = 2; + else + hDecoder->channelConfiguration = 1; + +#ifdef SBR_DEC +#ifdef DRM + if (channels == DRMCH_SBR_LC_STEREO) + hDecoder->lcstereo_flag = 1; + else + hDecoder->lcstereo_flag = 0; + + if ((channels == DRMCH_MONO) || (channels == DRMCH_STEREO)) + hDecoder->sbr_present_flag = 0; + else + hDecoder->sbr_present_flag = 1; + + /* Reset sbr for new initialization */ + sbrDecodeEnd(hDecoder->sbr[0]); + hDecoder->sbr[0] = NULL; +#endif +#endif /* must be done before frameLength is divided by 2 for LD */ hDecoder->fb = filter_bank_init(hDecoder->frameLength); #ifndef FIXED_POINT if (hDecoder->config.outputFormat >= FAAD_FMT_DITHER_LOWEST) - Init_Dither(16, hDecoder->config.outputFormat - FAAD_FMT_DITHER_LOWEST); + Init_Dither(16, (uint8_t)(hDecoder->config.outputFormat - FAAD_FMT_DITHER_LOWEST)); #endif return 0; @@ -425,7 +491,7 @@ void FAADAPI faacDecPostSeekReset(faacDecHandle hDecoder, int32_t frame) } } -void create_channel_config(faacDecHandle hDecoder, faacDecFrameInfo *hInfo) +static void create_channel_config(faacDecHandle hDecoder, faacDecFrameInfo *hInfo) { hInfo->num_front_channels = 0; hInfo->num_side_channels = 0; @@ -640,52 +706,78 @@ void* FAADAPI faacDecDecode(faacDecHandle hDecoder, uint8_t channels = 0, ch_ele = 0; uint8_t output_channels = 0; bitfile *ld = (bitfile*)malloc(sizeof(bitfile)); + uint32_t bitsconsumed; +#ifdef DRM + uint8_t *revbuffer; + uint8_t *prevbufstart; + uint8_t *pbufend; +#endif - /* local copys of globals */ - uint8_t sf_index = hDecoder->sf_index; - uint8_t object_type = hDecoder->object_type; - uint8_t channelConfiguration = hDecoder->channelConfiguration; + /* local copy of globals */ + uint8_t sf_index, object_type, channelConfiguration, outputFormat; + uint8_t *window_shape_prev; + uint16_t frame_len; #ifdef MAIN_DEC - pred_state **pred_stat = hDecoder->pred_stat; + pred_state **pred_stat; #endif #ifdef LTP_DEC - real_t **lt_pred_stat = hDecoder->lt_pred_stat; -#endif -#ifndef FIXED_POINT -#if POW_TABLE_SIZE - real_t *pow2_table = hDecoder->pow2_table; -#else - real_t *pow2_table = NULL; + real_t **lt_pred_stat; #endif -#endif - uint8_t *window_shape_prev = hDecoder->window_shape_prev; - real_t **time_out = hDecoder->time_out; + real_t **time_out; #ifdef SBR_DEC - real_t **time_out2 = hDecoder->time_out2; + real_t **time_out2; #endif #ifdef SSR_DEC - real_t **ssr_overlap = hDecoder->ssr_overlap; - real_t **prev_fmd = hDecoder->prev_fmd; + real_t **ssr_overlap, **prev_fmd; #endif - fb_info *fb = hDecoder->fb; - drc_info *drc = hDecoder->drc; - uint8_t outputFormat = hDecoder->config.outputFormat; + fb_info *fb; + drc_info *drc; #ifdef LTP_DEC - uint16_t *ltp_lag = hDecoder->ltp_lag; + uint16_t *ltp_lag; #endif - program_config *pce = &hDecoder->pce; + program_config *pce; + void *sample_buffer; element *syntax_elements[MAX_SYNTAX_ELEMENTS]; element **elements; - int16_t *spec_data[MAX_CHANNELS]; real_t *spec_coef[MAX_CHANNELS]; - uint16_t frame_len = hDecoder->frameLength; + /* safety checks */ + if ((hDecoder == NULL) || (hInfo == NULL) || (buffer == NULL) || (ld == NULL)) + { + return NULL; + } - void *sample_buffer; + sf_index = hDecoder->sf_index; + object_type = hDecoder->object_type; + channelConfiguration = hDecoder->channelConfiguration; +#ifdef MAIN_DEC + pred_stat = hDecoder->pred_stat; +#endif +#ifdef LTP_DEC + lt_pred_stat = hDecoder->lt_pred_stat; +#endif + window_shape_prev = hDecoder->window_shape_prev; + time_out = hDecoder->time_out; +#ifdef SBR_DEC + time_out2 = hDecoder->time_out2; +#endif +#ifdef SSR_DEC + ssr_overlap = hDecoder->ssr_overlap; + prev_fmd = hDecoder->prev_fmd; +#endif + fb = hDecoder->fb; + drc = hDecoder->drc; + outputFormat = hDecoder->config.outputFormat; +#ifdef LTP_DEC + ltp_lag = hDecoder->ltp_lag; +#endif + pce = &hDecoder->pce; + frame_len = hDecoder->frameLength; memset(hInfo, 0, sizeof(faacDecFrameInfo)); + memset(hDecoder->internal_channel, 0, MAX_CHANNELS*sizeof(hDecoder->internal_channel[0])); /* initialize the bitstream */ faad_initbits(ld, buffer, buffer_size); @@ -700,6 +792,7 @@ void* FAADAPI faacDecDecode(faacDecHandle hDecoder, if (hDecoder->adts_header_present) { + adts.old_format = hDecoder->config.useOldADTSFormat; if ((hInfo->error = adts_frame(&adts, ld)) > 0) goto error; @@ -717,7 +810,7 @@ void* FAADAPI faacDecDecode(faacDecHandle hDecoder, /* decode the complete bitstream */ elements = raw_data_block(hDecoder, hInfo, ld, syntax_elements, - spec_data, spec_coef, pce, drc); + spec_coef, pce, drc); ch_ele = hDecoder->fr_ch_ele; channels = hDecoder->fr_channels; @@ -727,7 +820,8 @@ void* FAADAPI faacDecDecode(faacDecHandle hDecoder, /* no more bit reading after this */ - hInfo->bytesconsumed = bit2byte(faad_get_processed_bits(ld)); + bitsconsumed = faad_get_processed_bits(ld); + hInfo->bytesconsumed = bit2byte(bitsconsumed); if (ld->error) { hInfo->error = 14; @@ -737,6 +831,43 @@ void* FAADAPI faacDecDecode(faacDecHandle hDecoder, if (ld) free(ld); ld = NULL; +#ifdef DRM +#ifdef SBR_DEC + if ((hDecoder->sbr_present_flag == 1) && (hDecoder->object_type == DRM_ER_LC)) + { + if (bitsconsumed + 8 > buffer_size*8) + { + hInfo->error = 14; + goto error; + } + + hDecoder->sbr_used[0] = 1; + + if (!hDecoder->sbr[0]) + hDecoder->sbr[0] = sbrDecodeInit(hDecoder->frameLength, 1); + + /* Reverse bit reading of SBR data in DRM audio frame */ + revbuffer = (uint8_t*)malloc(buffer_size*sizeof(uint8_t)); + prevbufstart = revbuffer; + pbufend = &buffer[buffer_size - 1]; + for (i = 0; i < buffer_size; i++) + *prevbufstart++ = tabFlipbits[*pbufend--]; + + /* Set SBR data */ + hDecoder->sbr[0]->data = revbuffer; + /* consider 8 bits from AAC-CRC */ + hDecoder->sbr[0]->data_size_bits = buffer_size*8 - bitsconsumed - 8; + hDecoder->sbr[0]->data_size = + bit2byte(hDecoder->sbr[0]->data_size_bits + 8); + + hDecoder->sbr[0]->lcstereo_flag = hDecoder->lcstereo_flag; + + hDecoder->sbr[0]->sample_rate = get_sample_rate(hDecoder->sf_index); + hDecoder->sbr[0]->sample_rate *= 2; + } +#endif +#endif + if (!hDecoder->adts_header_present && !hDecoder->adif_header_present) { if (channels != hDecoder->channelConfiguration) @@ -764,7 +895,17 @@ void* FAADAPI faacDecDecode(faacDecHandle hDecoder, /* number of channels in this frame */ hInfo->channels = output_channels; /* samplerate */ - hInfo->samplerate = sample_rates[hDecoder->sf_index]; + hInfo->samplerate = get_sample_rate(hDecoder->sf_index); + /* object type */ + hInfo->object_type = hDecoder->object_type; + /* sbr */ + hInfo->sbr = NO_SBR; + /* header type */ + hInfo->header_type = RAW; + if (hDecoder->adif_header_present) + hInfo->header_type = ADIF; + if (hDecoder->adts_header_present) + hInfo->header_type = ADTS; /* check if frame has channel elements */ if (channels == 0) @@ -776,7 +917,7 @@ void* FAADAPI faacDecDecode(faacDecHandle hDecoder, if (hDecoder->sample_buffer == NULL) { #ifdef SBR_DEC - if (hDecoder->sbr_present_flag == 1) + if ((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1)) { if (hDecoder->config.outputFormat == FAAD_FMT_DOUBLE) hDecoder->sample_buffer = malloc(2*frame_len*channels*sizeof(double)); @@ -795,31 +936,6 @@ void* FAADAPI faacDecDecode(faacDecHandle hDecoder, sample_buffer = hDecoder->sample_buffer; - /* noiseless coding is done, the rest of the tools come now */ - for (ch = 0; ch < channels; ch++) - { - ic_stream *ics; - - /* find the syntax element to which this channel belongs */ - if (syntax_elements[hDecoder->channel_element[ch]]->channel == ch) - ics = &(syntax_elements[hDecoder->channel_element[ch]]->ics1); - else if (syntax_elements[hDecoder->channel_element[ch]]->paired_channel == ch) - ics = &(syntax_elements[hDecoder->channel_element[ch]]->ics2); - - /* inverse quantization */ - inverse_quantization(spec_coef[ch], spec_data[ch], frame_len); - - /* apply scalefactors */ -#ifdef FIXED_POINT - apply_scalefactors(hDecoder, ics, spec_coef[ch], frame_len); -#else - apply_scalefactors(ics, spec_coef[ch], pow2_table, frame_len); -#endif - - /* deinterleave short block grouping */ - if (ics->window_sequence == EIGHT_SHORT_SEQUENCE) - quant_to_spec(ics, spec_coef[ch], frame_len); - } /* Because for ms, is and pns both channels spectral coefficients are needed we have to restart running through all channels here. @@ -850,9 +966,9 @@ void* FAADAPI faacDecDecode(faacDecHandle hDecoder, /* pns decoding */ if ((!right_channel) && (pch != -1) && (ics->ms_mask_present)) - pns_decode(ics, icsr, spec_coef[ch], spec_coef[pch], frame_len, 1); + pns_decode(ics, icsr, spec_coef[ch], spec_coef[pch], frame_len, 1, object_type); else if ((pch == -1) || ((pch != -1) && (!ics->ms_mask_present))) - pns_decode(ics, NULL, spec_coef[ch], NULL, frame_len, 0); + pns_decode(ics, NULL, spec_coef[ch], NULL, frame_len, 0, object_type); if (!right_channel && (pch != -1)) { @@ -992,10 +1108,22 @@ void* FAADAPI faacDecDecode(faacDecHandle hDecoder, } #ifdef SBR_DEC - if (hDecoder->sbr_present_flag == 1) + if ((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1)) { for (i = 0; i < ch_ele; i++) { + /* following case can happen when forceUpSampling == 1 */ + if (hDecoder->sbr[i] == NULL) + { + hDecoder->sbr[i] = sbrDecodeInit(hDecoder->frameLength +#ifdef DRM + , 0 +#endif + ); + hDecoder->sbr[i]->data = NULL; + hDecoder->sbr[i]->data_size = 0; + } + if (syntax_elements[i]->paired_channel != -1) { memcpy(time_out2[syntax_elements[i]->channel], @@ -1005,19 +1133,27 @@ void* FAADAPI faacDecDecode(faacDecHandle hDecoder, sbrDecodeFrame(hDecoder->sbr[i], time_out2[syntax_elements[i]->channel], time_out2[syntax_elements[i]->paired_channel], ID_CPE, - hDecoder->postSeekResetFlag); + hDecoder->postSeekResetFlag, hDecoder->forceUpSampling); } else { memcpy(time_out2[syntax_elements[i]->channel], time_out[syntax_elements[i]->channel], frame_len*sizeof(real_t)); sbrDecodeFrame(hDecoder->sbr[i], time_out2[syntax_elements[i]->channel], NULL, ID_SCE, - hDecoder->postSeekResetFlag); + hDecoder->postSeekResetFlag, hDecoder->forceUpSampling); } } frame_len *= 2; hInfo->samples *= 2; hInfo->samplerate *= 2; + /* sbr */ + if (hDecoder->sbr_present_flag == 1) + { + hInfo->object_type = HE_AAC; + hInfo->sbr = SBR_UPSAMPLED; + } else { + hInfo->sbr = NO_SBR_UPSAMPLED; + } sample_buffer = output_to_PCM(hDecoder, time_out2, sample_buffer, output_channels, frame_len, outputFormat); @@ -1029,13 +1165,6 @@ void* FAADAPI faacDecDecode(faacDecHandle hDecoder, } #endif - /* gapless playback */ - if (hDecoder->samplesLeft != 0) - { - hInfo->samples = hDecoder->samplesLeft*channels; - } - hDecoder->samplesLeft = 0; - hDecoder->postSeekResetFlag = 0; hDecoder->frame++; @@ -1045,32 +1174,6 @@ void* FAADAPI faacDecDecode(faacDecHandle hDecoder, #endif if (hDecoder->frame <= 1) hInfo->samples = 0; - -#if 0 - if (hDecoder->frame == 2 && hDecoder->sbr_present_flag == 1) - { - uint8_t samplesize; - switch (outputFormat) - { - case FAAD_FMT_16BIT: case FAAD_FMT_16BIT_DITHER: - case FAAD_FMT_16BIT_L_SHAPE: case FAAD_FMT_16BIT_M_SHAPE: - case FAAD_FMT_16BIT_H_SHAPE: - samplesize = 2; - break; - case FAAD_FMT_24BIT: - case FAAD_FMT_32BIT: - case FAAD_FMT_FLOAT: - samplesize = 4; - break; - case FAAD_FMT_DOUBLE: - samplesize = 8; - break; - } - hInfo->samples = 512*channels; - memmove(sample_buffer, (void*)((char*)sample_buffer + 1536*channels*samplesize), hInfo->samples*samplesize); - } -#endif - #ifdef LD_DEC } else { /* LD encoders will give lower delay */ @@ -1083,7 +1186,6 @@ void* FAADAPI faacDecDecode(faacDecHandle hDecoder, for (ch = 0; ch < channels; ch++) { if (spec_coef[ch]) free(spec_coef[ch]); - if (spec_data[ch]) free(spec_data[ch]); } for (i = 0; i < ch_ele; i++) @@ -1106,7 +1208,6 @@ error: for (ch = 0; ch < channels; ch++) { if (spec_coef[ch]) free(spec_coef[ch]); - if (spec_data[ch]) free(spec_data[ch]); } for (i = 0; i < ch_ele; i++) |