Originally committed as revision 23653 to svn://svn.ffmpeg.org/ffmpeg/trunkoldabi
Måns Rullgård
15 years ago
parent
1076b0d093
commit
6a74b1272e
5 changed files with 1 additions and 362 deletions
@ -1,333 +0,0 @@ |
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/*
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* Faad decoder |
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* Copyright (c) 2003 Zdenek Kabelac |
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* Copyright (c) 2004 Thomas Raivio |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/**
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* @file |
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* AAC decoder. |
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* |
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* still a bit unfinished - but it plays something |
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*/ |
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#include "avcodec.h" |
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#include "faad.h" |
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#ifndef FAADAPI |
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#define FAADAPI |
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#endif |
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/*
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* when CONFIG_LIBFAADBIN is true libfaad will be opened at runtime |
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*/ |
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//#undef CONFIG_LIBFAADBIN
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//#define CONFIG_LIBFAADBIN 0
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//#define CONFIG_LIBFAADBIN 1
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#if CONFIG_LIBFAADBIN |
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#include <dlfcn.h> |
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static const char* const libfaadname = "libfaad.so"; |
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#else |
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#define dlopen(a) |
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#define dlclose(a) |
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#endif |
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typedef struct { |
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void* handle; /* dlopen handle */ |
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void* faac_handle; /* FAAD library handle */ |
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int sample_size; |
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int init; |
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/* faad calls */ |
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faacDecHandle FAADAPI (*faacDecOpen)(void); |
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faacDecConfigurationPtr FAADAPI (*faacDecGetCurrentConfiguration)(faacDecHandle hDecoder); |
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#ifndef FAAD2_VERSION |
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int FAADAPI (*faacDecSetConfiguration)(faacDecHandle hDecoder, |
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faacDecConfigurationPtr config); |
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int FAADAPI (*faacDecInit)(faacDecHandle hDecoder, |
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unsigned char *buffer, |
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unsigned long *samplerate, |
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unsigned long *channels); |
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int FAADAPI (*faacDecInit2)(faacDecHandle hDecoder, unsigned char *pBuffer, |
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unsigned long SizeOfDecoderSpecificInfo, |
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unsigned long *samplerate, unsigned long *channels); |
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int FAADAPI (*faacDecDecode)(faacDecHandle hDecoder, |
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unsigned char *buffer, |
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unsigned long *bytesconsumed, |
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short *sample_buffer, |
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unsigned long *samples); |
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#else |
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unsigned char FAADAPI (*faacDecSetConfiguration)(faacDecHandle hDecoder, |
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faacDecConfigurationPtr config); |
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long FAADAPI (*faacDecInit)(faacDecHandle hDecoder, |
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unsigned char *buffer, |
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unsigned long buffer_size, |
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unsigned long *samplerate, |
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unsigned char *channels); |
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char FAADAPI (*faacDecInit2)(faacDecHandle hDecoder, unsigned char *pBuffer, |
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unsigned long SizeOfDecoderSpecificInfo, |
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unsigned long *samplerate, unsigned char *channels); |
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void *FAADAPI (*faacDecDecode)(faacDecHandle hDecoder, |
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faacDecFrameInfo *hInfo, |
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unsigned char *buffer, |
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unsigned long buffer_size); |
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char* FAADAPI (*faacDecGetErrorMessage)(unsigned char errcode); |
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#endif |
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void FAADAPI (*faacDecClose)(faacDecHandle hDecoder); |
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} FAACContext; |
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static const unsigned long faac_srates[] = |
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{ |
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96000, 88200, 64000, 48000, 44100, 32000, |
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24000, 22050, 16000, 12000, 11025, 8000 |
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}; |
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static void channel_setup(AVCodecContext *avctx) |
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{ |
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#ifdef FAAD2_VERSION |
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FAACContext *s = avctx->priv_data; |
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if (avctx->request_channels > 0 && avctx->request_channels == 2 && |
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avctx->request_channels < avctx->channels) { |
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faacDecConfigurationPtr faac_cfg; |
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avctx->channels = 2; |
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faac_cfg = s->faacDecGetCurrentConfiguration(s->faac_handle); |
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faac_cfg->downMatrix = 1; |
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s->faacDecSetConfiguration(s->faac_handle, faac_cfg); |
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} |
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#endif |
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} |
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static av_cold int faac_init_mp4(AVCodecContext *avctx) |
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{ |
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FAACContext *s = avctx->priv_data; |
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unsigned long samplerate; |
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#ifndef FAAD2_VERSION |
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unsigned long channels; |
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#else |
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unsigned char channels; |
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#endif |
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int r = 0; |
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if (avctx->extradata){ |
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r = s->faacDecInit2(s->faac_handle, (uint8_t*) avctx->extradata, |
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avctx->extradata_size, |
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&samplerate, &channels); |
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if (r < 0){ |
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av_log(avctx, AV_LOG_ERROR, |
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"faacDecInit2 failed r:%d sr:%ld ch:%ld s:%d\n", |
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r, samplerate, (long)channels, avctx->extradata_size); |
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} else { |
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avctx->sample_rate = samplerate; |
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avctx->channels = channels; |
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channel_setup(avctx); |
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s->init = 1; |
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} |
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} |
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return r; |
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} |
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static int faac_decode_frame(AVCodecContext *avctx, |
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void *data, int *data_size, |
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AVPacket *avpkt) |
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{ |
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const uint8_t *buf = avpkt->data; |
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int buf_size = avpkt->size; |
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FAACContext *s = avctx->priv_data; |
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#ifndef FAAD2_VERSION |
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unsigned long bytesconsumed; |
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short *sample_buffer = NULL; |
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unsigned long samples; |
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int out; |
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#else |
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faacDecFrameInfo frame_info; |
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void *out; |
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#endif |
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if(buf_size == 0) |
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return 0; |
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#ifndef FAAD2_VERSION |
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out = s->faacDecDecode(s->faac_handle, |
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(unsigned char*)buf, |
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&bytesconsumed, |
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data, |
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&samples); |
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samples *= s->sample_size; |
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if (data_size) |
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*data_size = samples; |
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return (buf_size < (int)bytesconsumed) |
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? buf_size : (int)bytesconsumed; |
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#else |
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if(!s->init){ |
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unsigned long srate; |
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unsigned char channels; |
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int r = s->faacDecInit(s->faac_handle, buf, buf_size, &srate, &channels); |
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if(r < 0){ |
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av_log(avctx, AV_LOG_ERROR, "libfaad: codec init failed.\n"); |
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return -1; |
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} |
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avctx->sample_rate = srate; |
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avctx->channels = channels; |
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channel_setup(avctx); |
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s->init = 1; |
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} |
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out = s->faacDecDecode(s->faac_handle, &frame_info, (unsigned char*)buf, (unsigned long)buf_size); |
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if (frame_info.error > 0) { |
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av_log(avctx, AV_LOG_ERROR, "libfaad: frame decoding failed: %s\n", |
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s->faacDecGetErrorMessage(frame_info.error)); |
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return -1; |
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} |
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if (!avctx->frame_size) |
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avctx->frame_size = frame_info.samples/avctx->channels; |
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frame_info.samples *= s->sample_size; |
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memcpy(data, out, frame_info.samples); // CHECKME - can we cheat this one
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if (data_size) |
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*data_size = frame_info.samples; |
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return (buf_size < (int)frame_info.bytesconsumed) |
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? buf_size : (int)frame_info.bytesconsumed; |
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#endif |
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} |
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static av_cold int faac_decode_end(AVCodecContext *avctx) |
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{ |
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FAACContext *s = avctx->priv_data; |
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s->faacDecClose(s->faac_handle); |
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dlclose(s->handle); |
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return 0; |
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} |
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static av_cold int faac_decode_init(AVCodecContext *avctx) |
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{ |
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FAACContext *s = avctx->priv_data; |
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faacDecConfigurationPtr faac_cfg; |
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#if CONFIG_LIBFAADBIN |
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const char* err = 0; |
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s->handle = dlopen(libfaadname, RTLD_LAZY); |
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if (!s->handle) |
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{ |
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av_log(avctx, AV_LOG_ERROR, "FAAD library: %s could not be opened! \n%s\n", |
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libfaadname, dlerror()); |
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return -1; |
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} |
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#define dfaac(a) do { \ |
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const char* n = AV_STRINGIFY(faacDec ## a); \
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if (!err && !(s->faacDec ## a = dlsym(s->handle, n))) { \
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err = n; \
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} \
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} while(0) |
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#else /* !CONFIG_LIBFAADBIN */ |
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#define dfaac(a) s->faacDec ## a = faacDec ## a |
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#endif /* CONFIG_LIBFAADBIN */ |
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// resolve all needed function calls
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dfaac(Open); |
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dfaac(Close); |
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dfaac(GetCurrentConfiguration); |
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dfaac(SetConfiguration); |
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dfaac(Init); |
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dfaac(Init2); |
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dfaac(Decode); |
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#ifdef FAAD2_VERSION |
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dfaac(GetErrorMessage); |
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#endif |
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#undef dfaac |
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#if CONFIG_LIBFAADBIN |
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if (err) { |
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dlclose(s->handle); |
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av_log(avctx, AV_LOG_ERROR, "FAAD library: cannot resolve %s in %s!\n", |
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err, libfaadname); |
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return -1; |
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} |
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#endif |
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s->faac_handle = s->faacDecOpen(); |
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if (!s->faac_handle) { |
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av_log(avctx, AV_LOG_ERROR, "FAAD library: cannot create handler!\n"); |
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faac_decode_end(avctx); |
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return -1; |
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} |
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faac_cfg = s->faacDecGetCurrentConfiguration(s->faac_handle); |
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if (faac_cfg) { |
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switch (avctx->bits_per_coded_sample) { |
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case 8: av_log(avctx, AV_LOG_ERROR, "FAADlib unsupported bps %d\n", avctx->bits_per_coded_sample); break; |
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default: |
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case 16: |
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#ifdef FAAD2_VERSION |
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faac_cfg->outputFormat = FAAD_FMT_16BIT; |
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#endif |
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s->sample_size = 2; |
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break; |
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case 24: |
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#ifdef FAAD2_VERSION |
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faac_cfg->outputFormat = FAAD_FMT_24BIT; |
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#endif |
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s->sample_size = 3; |
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break; |
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case 32: |
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#ifdef FAAD2_VERSION |
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faac_cfg->outputFormat = FAAD_FMT_32BIT; |
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#endif |
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s->sample_size = 4; |
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break; |
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} |
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faac_cfg->defSampleRate = (!avctx->sample_rate) ? 44100 : avctx->sample_rate; |
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faac_cfg->defObjectType = LC; |
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} |
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s->faacDecSetConfiguration(s->faac_handle, faac_cfg); |
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faac_init_mp4(avctx); |
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if(!s->init && avctx->channels > 0) |
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channel_setup(avctx); |
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avctx->sample_fmt = SAMPLE_FMT_S16; |
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return 0; |
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} |
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AVCodec libfaad_decoder = { |
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"libfaad", |
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AVMEDIA_TYPE_AUDIO, |
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CODEC_ID_AAC, |
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sizeof(FAACContext), |
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faac_decode_init, |
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NULL, |
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faac_decode_end, |
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faac_decode_frame, |
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.long_name = NULL_IF_CONFIG_SMALL("libfaad AAC (Advanced Audio Codec)"), |
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}; |
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