| /* |
| * 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 libavcodec/libfaad.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 true libfaad will be opened at runtime |
| */ |
| //#undef CONFIG_LIBFAADBIN |
| //#define CONFIG_LIBFAADBIN 0 |
| //#define CONFIG_LIBFAADBIN 1 |
| |
| #if CONFIG_LIBFAADBIN |
| #include <dlfcn.h> |
| static const char* const 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 av_cold 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.\n"); |
| 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; |
| } |
| if (!avctx->frame_size) |
| avctx->frame_size = frame_info.samples/avctx->channels; |
| 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 av_cold int faac_decode_end(AVCodecContext *avctx) |
| { |
| FAACContext *s = avctx->priv_data; |
| |
| s->faacDecClose(s->faac_handle); |
| |
| dlclose(s->handle); |
| return 0; |
| } |
| |
| static av_cold int faac_decode_init(AVCodecContext *avctx) |
| { |
| FAACContext *s = avctx->priv_data; |
| faacDecConfigurationPtr faac_cfg; |
| |
| #if 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 |
| |
| #if 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_coded_sample) { |
| case 8: av_log(avctx, AV_LOG_ERROR, "FAADlib unsupported bps %d\n", avctx->bits_per_coded_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); |
| |
| avctx->sample_fmt = SAMPLE_FMT_S16; |
| return 0; |
| } |
| |
| #define AAC_CODEC(id, name, long_name_) \ |
| AVCodec name ## _decoder = { \ |
| #name, \ |
| CODEC_TYPE_AUDIO, \ |
| id, \ |
| sizeof(FAACContext), \ |
| faac_decode_init, \ |
| NULL, \ |
| faac_decode_end, \ |
| faac_decode_frame, \ |
| .long_name = NULL_IF_CONFIG_SMALL(long_name_), \ |
| } |
| |
| // FIXME - raw AAC files - maybe just one entry will be enough |
| AAC_CODEC(CODEC_ID_AAC, libfaad, "libfaad AAC (Advanced Audio Codec)"); |
| |
| #undef AAC_CODEC |
