/* * Faad decoder * Copyright (c) 2003 Zdenek Kabelac. * Copyright (c) 2004 Thomas Raivio. * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file faad.c * AAC decoder. * * still a bit unfinished - but it plays something */ #include "avcodec.h" #include "faad.h" #ifndef FAADAPI #define FAADAPI #endif /* * when CONFIG_LIBFAADBIN is defined the libfaad will be opened at runtime */ //#undef CONFIG_LIBFAADBIN //#define CONFIG_LIBFAADBIN #ifdef CONFIG_LIBFAADBIN #include <dlfcn.h> static const char* libfaadname = "libfaad.so"; #else #define dlopen(a) #define dlclose(a) #endif typedef struct { void* handle; /* dlopen handle */ void* faac_handle; /* FAAD library handle */ int sample_size; int init; /* faad calls */ faacDecHandle FAADAPI (*faacDecOpen)(void); faacDecConfigurationPtr FAADAPI (*faacDecGetCurrentConfiguration)(faacDecHandle hDecoder); #ifndef FAAD2_VERSION int FAADAPI (*faacDecSetConfiguration)(faacDecHandle hDecoder, faacDecConfigurationPtr config); int FAADAPI (*faacDecInit)(faacDecHandle hDecoder, unsigned char *buffer, unsigned long *samplerate, unsigned long *channels); int FAADAPI (*faacDecInit2)(faacDecHandle hDecoder, unsigned char *pBuffer, unsigned long SizeOfDecoderSpecificInfo, unsigned long *samplerate, unsigned long *channels); int FAADAPI (*faacDecDecode)(faacDecHandle hDecoder, unsigned char *buffer, unsigned long *bytesconsumed, short *sample_buffer, unsigned long *samples); #else unsigned char FAADAPI (*faacDecSetConfiguration)(faacDecHandle hDecoder, faacDecConfigurationPtr config); long FAADAPI (*faacDecInit)(faacDecHandle hDecoder, unsigned char *buffer, unsigned long buffer_size, unsigned long *samplerate, unsigned char *channels); char FAADAPI (*faacDecInit2)(faacDecHandle hDecoder, unsigned char *pBuffer, unsigned long SizeOfDecoderSpecificInfo, unsigned long *samplerate, unsigned char *channels); void *FAADAPI (*faacDecDecode)(faacDecHandle hDecoder, faacDecFrameInfo *hInfo, unsigned char *buffer, unsigned long buffer_size); char* FAADAPI (*faacDecGetErrorMessage)(unsigned char errcode); #endif void FAADAPI (*faacDecClose)(faacDecHandle hDecoder); } FAACContext; static const unsigned long faac_srates[] = { 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000 }; static void channel_setup(AVCodecContext *avctx) { #ifdef FAAD2_VERSION FAACContext *s = avctx->priv_data; if (avctx->request_channels > 0 && avctx->request_channels == 2 && avctx->request_channels < avctx->channels) { faacDecConfigurationPtr faac_cfg; avctx->channels = 2; faac_cfg = s->faacDecGetCurrentConfiguration(s->faac_handle); faac_cfg->downMatrix = 1; s->faacDecSetConfiguration(s->faac_handle, faac_cfg); } #endif } static int faac_init_mp4(AVCodecContext *avctx) { FAACContext *s = avctx->priv_data; unsigned long samplerate; #ifndef FAAD2_VERSION unsigned long channels; #else unsigned char channels; #endif int r = 0; if (avctx->extradata){ r = s->faacDecInit2(s->faac_handle, (uint8_t*) avctx->extradata, avctx->extradata_size, &samplerate, &channels); if (r < 0){ av_log(avctx, AV_LOG_ERROR, "faacDecInit2 failed r:%d sr:%ld ch:%ld s:%d\n", r, samplerate, (long)channels, avctx->extradata_size); } else { avctx->sample_rate = samplerate; avctx->channels = channels; channel_setup(avctx); s->init = 1; } } return r; } static int faac_decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size) { FAACContext *s = avctx->priv_data; #ifndef FAAD2_VERSION unsigned long bytesconsumed; short *sample_buffer = NULL; unsigned long samples; int out; #else faacDecFrameInfo frame_info; void *out; #endif if(buf_size == 0) return 0; #ifndef FAAD2_VERSION out = s->faacDecDecode(s->faac_handle, (unsigned char*)buf, &bytesconsumed, data, &samples); samples *= s->sample_size; if (data_size) *data_size = samples; return (buf_size < (int)bytesconsumed) ? buf_size : (int)bytesconsumed; #else if(!s->init){ unsigned long srate; unsigned char channels; int r = s->faacDecInit(s->faac_handle, buf, buf_size, &srate, &channels); if(r < 0){ av_log(avctx, AV_LOG_ERROR, "faac: codec init failed: %s\n", s->faacDecGetErrorMessage(frame_info.error)); return -1; } avctx->sample_rate = srate; avctx->channels = channels; channel_setup(avctx); s->init = 1; } out = s->faacDecDecode(s->faac_handle, &frame_info, (unsigned char*)buf, (unsigned long)buf_size); if (frame_info.error > 0) { av_log(avctx, AV_LOG_ERROR, "faac: frame decoding failed: %s\n", s->faacDecGetErrorMessage(frame_info.error)); return -1; } frame_info.samples *= s->sample_size; memcpy(data, out, frame_info.samples); // CHECKME - can we cheat this one if (data_size) *data_size = frame_info.samples; return (buf_size < (int)frame_info.bytesconsumed) ? buf_size : (int)frame_info.bytesconsumed; #endif } static int faac_decode_end(AVCodecContext *avctx) { FAACContext *s = avctx->priv_data; s->faacDecClose(s->faac_handle); dlclose(s->handle); return 0; } static int faac_decode_init(AVCodecContext *avctx) { FAACContext *s = avctx->priv_data; faacDecConfigurationPtr faac_cfg; #ifdef CONFIG_LIBFAADBIN const char* err = 0; s->handle = dlopen(libfaadname, RTLD_LAZY); if (!s->handle) { av_log(avctx, AV_LOG_ERROR, "FAAD library: %s could not be opened! \n%s\n", libfaadname, dlerror()); return -1; } #define dfaac(a) do { \ const char* n = AV_STRINGIFY(faacDec ## a); \ if (!err && !(s->faacDec ## a = dlsym(s->handle, n))) { \ err = n; \ } \ } while(0) #else /* !CONFIG_LIBFAADBIN */ #define dfaac(a) s->faacDec ## a = faacDec ## a #endif /* CONFIG_LIBFAADBIN */ // resolve all needed function calls dfaac(Open); dfaac(Close); dfaac(GetCurrentConfiguration); dfaac(SetConfiguration); dfaac(Init); dfaac(Init2); dfaac(Decode); #ifdef FAAD2_VERSION dfaac(GetErrorMessage); #endif #undef dfaac #ifdef CONFIG_LIBFAADBIN if (err) { dlclose(s->handle); av_log(avctx, AV_LOG_ERROR, "FAAD library: cannot resolve %s in %s!\n", err, libfaadname); return -1; } #endif s->faac_handle = s->faacDecOpen(); if (!s->faac_handle) { av_log(avctx, AV_LOG_ERROR, "FAAD library: cannot create handler!\n"); faac_decode_end(avctx); return -1; } faac_cfg = s->faacDecGetCurrentConfiguration(s->faac_handle); if (faac_cfg) { switch (avctx->bits_per_sample) { case 8: av_log(avctx, AV_LOG_ERROR, "FAADlib unsupported bps %d\n", avctx->bits_per_sample); break; default: case 16: #ifdef FAAD2_VERSION faac_cfg->outputFormat = FAAD_FMT_16BIT; #endif s->sample_size = 2; break; case 24: #ifdef FAAD2_VERSION faac_cfg->outputFormat = FAAD_FMT_24BIT; #endif s->sample_size = 3; break; case 32: #ifdef FAAD2_VERSION faac_cfg->outputFormat = FAAD_FMT_32BIT; #endif s->sample_size = 4; break; } faac_cfg->defSampleRate = (!avctx->sample_rate) ? 44100 : avctx->sample_rate; faac_cfg->defObjectType = LC; } s->faacDecSetConfiguration(s->faac_handle, faac_cfg); faac_init_mp4(avctx); if(!s->init && avctx->channels > 0) channel_setup(avctx); return 0; } #define AAC_CODEC(id, name) \ AVCodec name ## _decoder = { \ #name, \ CODEC_TYPE_AUDIO, \ id, \ sizeof(FAACContext), \ faac_decode_init, \ NULL, \ faac_decode_end, \ faac_decode_frame, \ } // FIXME - raw AAC files - maybe just one entry will be enough AAC_CODEC(CODEC_ID_AAC, libfaad); #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) // If it's mp4 file - usually embeded into Qt Mov AAC_CODEC(CODEC_ID_MPEG4AAC, mpeg4aac); #endif #undef AAC_CODEC