diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/libmp3lame.c')
-rw-r--r-- | contrib/ffmpeg/libavcodec/libmp3lame.c | 221 |
1 files changed, 0 insertions, 221 deletions
diff --git a/contrib/ffmpeg/libavcodec/libmp3lame.c b/contrib/ffmpeg/libavcodec/libmp3lame.c deleted file mode 100644 index 6fbf2e23d..000000000 --- a/contrib/ffmpeg/libavcodec/libmp3lame.c +++ /dev/null @@ -1,221 +0,0 @@ -/* - * Interface to libmp3lame for mp3 encoding - * Copyright (c) 2002 Lennert Buytenhek <buytenh@gnu.org> - * - * 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 mp3lameaudio.c - * Interface to libmp3lame for mp3 encoding. - */ - -#include "avcodec.h" -#include "mpegaudio.h" -#include <lame/lame.h> - -#define BUFFER_SIZE (7200 + MPA_FRAME_SIZE + MPA_FRAME_SIZE/4) -typedef struct Mp3AudioContext { - lame_global_flags *gfp; - int stereo; - uint8_t buffer[BUFFER_SIZE]; - int buffer_index; -} Mp3AudioContext; - -static int MP3lame_encode_init(AVCodecContext *avctx) -{ - Mp3AudioContext *s = avctx->priv_data; - - if (avctx->channels > 2) - return -1; - - s->stereo = avctx->channels > 1 ? 1 : 0; - - if ((s->gfp = lame_init()) == NULL) - goto err; - lame_set_in_samplerate(s->gfp, avctx->sample_rate); - lame_set_out_samplerate(s->gfp, avctx->sample_rate); - lame_set_num_channels(s->gfp, avctx->channels); - /* lame 3.91 dies on quality != 5 */ - lame_set_quality(s->gfp, 5); - /* lame 3.91 doesn't work in mono */ - lame_set_mode(s->gfp, JOINT_STEREO); - lame_set_brate(s->gfp, avctx->bit_rate/1000); - if(avctx->flags & CODEC_FLAG_QSCALE) { - lame_set_brate(s->gfp, 0); - lame_set_VBR(s->gfp, vbr_default); - lame_set_VBR_q(s->gfp, avctx->global_quality / (float)FF_QP2LAMBDA); - } - lame_set_bWriteVbrTag(s->gfp,0); - lame_set_disable_reservoir(s->gfp, avctx->flags2 & CODEC_FLAG2_BIT_RESERVOIR ? 0 : 1); - if (lame_init_params(s->gfp) < 0) - goto err_close; - - avctx->frame_size = lame_get_framesize(s->gfp); - - avctx->coded_frame= avcodec_alloc_frame(); - avctx->coded_frame->key_frame= 1; - - return 0; - -err_close: - lame_close(s->gfp); -err: - return -1; -} - -static const int sSampleRates[3] = { - 44100, 48000, 32000 -}; - -static const int sBitRates[2][3][15] = { - { { 0, 32, 64, 96,128,160,192,224,256,288,320,352,384,416,448}, - { 0, 32, 48, 56, 64, 80, 96,112,128,160,192,224,256,320,384}, - { 0, 32, 40, 48, 56, 64, 80, 96,112,128,160,192,224,256,320} - }, - { { 0, 32, 48, 56, 64, 80, 96,112,128,144,160,176,192,224,256}, - { 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160}, - { 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96,112,128,144,160} - }, -}; - -static const int sSamplesPerFrame[2][3] = -{ - { 384, 1152, 1152 }, - { 384, 1152, 576 } -}; - -static const int sBitsPerSlot[3] = { - 32, - 8, - 8 -}; - -static int mp3len(void *data, int *samplesPerFrame, int *sampleRate) -{ - uint32_t header = AV_RB32(data); - int layerID = 3 - ((header >> 17) & 0x03); - int bitRateID = ((header >> 12) & 0x0f); - int sampleRateID = ((header >> 10) & 0x03); - int bitsPerSlot = sBitsPerSlot[layerID]; - int isPadded = ((header >> 9) & 0x01); - static int const mode_tab[4]= {2,3,1,0}; - int mode= mode_tab[(header >> 19) & 0x03]; - int mpeg_id= mode>0; - int temp0, temp1, bitRate; - - if ( (( header >> 21 ) & 0x7ff) != 0x7ff || mode == 3 || layerID==3 || sampleRateID==3) { - return -1; - } - - if(!samplesPerFrame) samplesPerFrame= &temp0; - if(!sampleRate ) sampleRate = &temp1; - -// *isMono = ((header >> 6) & 0x03) == 0x03; - - *sampleRate = sSampleRates[sampleRateID]>>mode; - bitRate = sBitRates[mpeg_id][layerID][bitRateID] * 1000; - *samplesPerFrame = sSamplesPerFrame[mpeg_id][layerID]; -//av_log(NULL, AV_LOG_DEBUG, "sr:%d br:%d spf:%d l:%d m:%d\n", *sampleRate, bitRate, *samplesPerFrame, layerID, mode); - - return *samplesPerFrame * bitRate / (bitsPerSlot * *sampleRate) + isPadded; -} - -static int MP3lame_encode_frame(AVCodecContext *avctx, - unsigned char *frame, int buf_size, void *data) -{ - Mp3AudioContext *s = avctx->priv_data; - int len; - int lame_result; - - /* lame 3.91 dies on '1-channel interleaved' data */ - - if(data){ - if (s->stereo) { - lame_result = lame_encode_buffer_interleaved( - s->gfp, - data, - avctx->frame_size, - s->buffer + s->buffer_index, - BUFFER_SIZE - s->buffer_index - ); - } else { - lame_result = lame_encode_buffer( - s->gfp, - data, - data, - avctx->frame_size, - s->buffer + s->buffer_index, - BUFFER_SIZE - s->buffer_index - ); - } - }else{ - lame_result= lame_encode_flush( - s->gfp, - s->buffer + s->buffer_index, - BUFFER_SIZE - s->buffer_index - ); - } - - if(lame_result==-1) { - /* output buffer too small */ - av_log(avctx, AV_LOG_ERROR, "lame: output buffer too small (buffer index: %d, free bytes: %d)\n", s->buffer_index, BUFFER_SIZE - s->buffer_index); - return 0; - } - - s->buffer_index += lame_result; - - if(s->buffer_index<4) - return 0; - - len= mp3len(s->buffer, NULL, NULL); -//av_log(avctx, AV_LOG_DEBUG, "in:%d packet-len:%d index:%d\n", avctx->frame_size, len, s->buffer_index); - if(len <= s->buffer_index){ - memcpy(frame, s->buffer, len); - s->buffer_index -= len; - - memmove(s->buffer, s->buffer+len, s->buffer_index); - //FIXME fix the audio codec API, so we do not need the memcpy() -/*for(i=0; i<len; i++){ - av_log(avctx, AV_LOG_DEBUG, "%2X ", frame[i]); -}*/ - return len; - }else - return 0; -} - -static int MP3lame_encode_close(AVCodecContext *avctx) -{ - Mp3AudioContext *s = avctx->priv_data; - - av_freep(&avctx->coded_frame); - - lame_close(s->gfp); - return 0; -} - - -AVCodec libmp3lame_encoder = { - "libmp3lame", - CODEC_TYPE_AUDIO, - CODEC_ID_MP3, - sizeof(Mp3AudioContext), - MP3lame_encode_init, - MP3lame_encode_frame, - MP3lame_encode_close, - .capabilities= CODEC_CAP_DELAY, -}; |