diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/oggvorbis.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/oggvorbis.c | 383 |
1 files changed, 0 insertions, 383 deletions
diff --git a/contrib/ffmpeg/libavcodec/oggvorbis.c b/contrib/ffmpeg/libavcodec/oggvorbis.c deleted file mode 100644 index da97e9a78..000000000 --- a/contrib/ffmpeg/libavcodec/oggvorbis.c +++ /dev/null @@ -1,383 +0,0 @@ -/* - * copyright (c) 2002 Mark Hills <mark@pogo.org.uk> - * - * 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 St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file oggvorbis.c - * Ogg Vorbis codec support via libvorbisenc. - * @author Mark Hills <mark@pogo.org.uk> - */ - -#include <vorbis/vorbisenc.h> - -#include "avcodec.h" - -#undef NDEBUG -#include <assert.h> - -#define OGGVORBIS_FRAME_SIZE 64 - -#define BUFFER_SIZE (1024*64) - -typedef struct OggVorbisContext { - vorbis_info vi ; - vorbis_dsp_state vd ; - vorbis_block vb ; - uint8_t buffer[BUFFER_SIZE]; - int buffer_index; - - /* decoder */ - vorbis_comment vc ; - ogg_packet op; -} OggVorbisContext ; - - -static int oggvorbis_init_encoder(vorbis_info *vi, AVCodecContext *avccontext) { - double cfreq; - - if(avccontext->flags & CODEC_FLAG_QSCALE) { - /* variable bitrate */ - if(vorbis_encode_setup_vbr(vi, avccontext->channels, - avccontext->sample_rate, - avccontext->global_quality / (float)FF_QP2LAMBDA)) - return -1; - } else { - /* constant bitrate */ - if(vorbis_encode_setup_managed(vi, avccontext->channels, - avccontext->sample_rate, -1, avccontext->bit_rate, -1)) - return -1; - -#ifdef OGGVORBIS_VBR_BY_ESTIMATE - /* variable bitrate by estimate */ - if(vorbis_encode_ctl(vi, OV_ECTL_RATEMANAGE_AVG, NULL)) - return -1; -#endif - } - - /* cutoff frequency */ - if(avccontext->cutoff > 0) { - cfreq = avccontext->cutoff / 1000.0; - if(vorbis_encode_ctl(vi, OV_ECTL_LOWPASS_SET, &cfreq)) - return -1; - } - - return vorbis_encode_setup_init(vi); -} - -static int oggvorbis_encode_init(AVCodecContext *avccontext) { - OggVorbisContext *context = avccontext->priv_data ; - ogg_packet header, header_comm, header_code; - uint8_t *p; - unsigned int offset, len; - - vorbis_info_init(&context->vi) ; - if(oggvorbis_init_encoder(&context->vi, avccontext) < 0) { - av_log(avccontext, AV_LOG_ERROR, "oggvorbis_encode_init: init_encoder failed") ; - return -1 ; - } - vorbis_analysis_init(&context->vd, &context->vi) ; - vorbis_block_init(&context->vd, &context->vb) ; - - vorbis_comment_init(&context->vc); - vorbis_comment_add_tag(&context->vc, "encoder", LIBAVCODEC_IDENT) ; - - vorbis_analysis_headerout(&context->vd, &context->vc, &header, - &header_comm, &header_code); - - len = header.bytes + header_comm.bytes + header_code.bytes; - avccontext->extradata_size= 64 + len + len/255; - p = avccontext->extradata= av_mallocz(avccontext->extradata_size); - p[0] = 2; - offset = 1; - offset += av_xiphlacing(&p[offset], header.bytes); - offset += av_xiphlacing(&p[offset], header_comm.bytes); - memcpy(&p[offset], header.packet, header.bytes); - offset += header.bytes; - memcpy(&p[offset], header_comm.packet, header_comm.bytes); - offset += header_comm.bytes; - memcpy(&p[offset], header_code.packet, header_code.bytes); - offset += header_code.bytes; - avccontext->extradata_size = offset; - avccontext->extradata= av_realloc(avccontext->extradata, avccontext->extradata_size); - -/* vorbis_block_clear(&context->vb); - vorbis_dsp_clear(&context->vd); - vorbis_info_clear(&context->vi);*/ - vorbis_comment_clear(&context->vc); - - avccontext->frame_size = OGGVORBIS_FRAME_SIZE ; - - avccontext->coded_frame= avcodec_alloc_frame(); - avccontext->coded_frame->key_frame= 1; - - return 0 ; -} - - -static int oggvorbis_encode_frame(AVCodecContext *avccontext, - unsigned char *packets, - int buf_size, void *data) -{ - OggVorbisContext *context = avccontext->priv_data ; - float **buffer ; - ogg_packet op ; - signed short *audio = data ; - int l, samples = data ? OGGVORBIS_FRAME_SIZE : 0; - - buffer = vorbis_analysis_buffer(&context->vd, samples) ; - - if(context->vi.channels == 1) { - for(l = 0 ; l < samples ; l++) - buffer[0][l]=audio[l]/32768.f; - } else { - for(l = 0 ; l < samples ; l++){ - buffer[0][l]=audio[l*2]/32768.f; - buffer[1][l]=audio[l*2+1]/32768.f; - } - } - - vorbis_analysis_wrote(&context->vd, samples) ; - - while(vorbis_analysis_blockout(&context->vd, &context->vb) == 1) { - vorbis_analysis(&context->vb, NULL); - vorbis_bitrate_addblock(&context->vb) ; - - while(vorbis_bitrate_flushpacket(&context->vd, &op)) { - /* i'd love to say the following line is a hack, but sadly it's - * not, apparently the end of stream decision is in libogg. */ - if(op.bytes==1) - continue; - memcpy(context->buffer + context->buffer_index, &op, sizeof(ogg_packet)); - context->buffer_index += sizeof(ogg_packet); - memcpy(context->buffer + context->buffer_index, op.packet, op.bytes); - context->buffer_index += op.bytes; -// av_log(avccontext, AV_LOG_DEBUG, "e%d / %d\n", context->buffer_index, op.bytes); - } - } - - l=0; - if(context->buffer_index){ - ogg_packet *op2= (ogg_packet*)context->buffer; - op2->packet = context->buffer + sizeof(ogg_packet); - - l= op2->bytes; - avccontext->coded_frame->pts= av_rescale_q(op2->granulepos, (AVRational){1, avccontext->sample_rate}, avccontext->time_base); - //FIXME we should reorder the user supplied pts and not assume that they are spaced by 1/sample_rate - - memcpy(packets, op2->packet, l); - context->buffer_index -= l + sizeof(ogg_packet); - memcpy(context->buffer, context->buffer + l + sizeof(ogg_packet), context->buffer_index); -// av_log(avccontext, AV_LOG_DEBUG, "E%d\n", l); - } - - return l; -} - - -static int oggvorbis_encode_close(AVCodecContext *avccontext) { - OggVorbisContext *context = avccontext->priv_data ; -/* ogg_packet op ; */ - - vorbis_analysis_wrote(&context->vd, 0) ; /* notify vorbisenc this is EOF */ - - vorbis_block_clear(&context->vb); - vorbis_dsp_clear(&context->vd); - vorbis_info_clear(&context->vi); - - av_freep(&avccontext->coded_frame); - av_freep(&avccontext->extradata); - - return 0 ; -} - - -AVCodec oggvorbis_encoder = { - "vorbis", - CODEC_TYPE_AUDIO, - CODEC_ID_VORBIS, - sizeof(OggVorbisContext), - oggvorbis_encode_init, - oggvorbis_encode_frame, - oggvorbis_encode_close, - .capabilities= CODEC_CAP_DELAY, -} ; - -static int oggvorbis_decode_init(AVCodecContext *avccontext) { - OggVorbisContext *context = avccontext->priv_data ; - uint8_t *p= avccontext->extradata; - int i, hsizes[3]; - unsigned char *headers[3], *extradata = avccontext->extradata; - - vorbis_info_init(&context->vi) ; - vorbis_comment_init(&context->vc) ; - - if(! avccontext->extradata_size || ! p) { - av_log(avccontext, AV_LOG_ERROR, "vorbis extradata absent\n"); - return -1; - } - - if(p[0] == 0 && p[1] == 30) { - for(i = 0; i < 3; i++){ - hsizes[i] = *p++ << 8; - hsizes[i] += *p++; - headers[i] = p; - p += hsizes[i]; - } - } else if(*p == 2) { - unsigned int offset = 1; - p++; - for(i=0; i<2; i++) { - hsizes[i] = 0; - while((*p == 0xFF) && (offset < avccontext->extradata_size)) { - hsizes[i] += 0xFF; - offset++; - p++; - } - if(offset >= avccontext->extradata_size - 1) { - av_log(avccontext, AV_LOG_ERROR, - "vorbis header sizes damaged\n"); - return -1; - } - hsizes[i] += *p; - offset++; - p++; - } - hsizes[2] = avccontext->extradata_size - hsizes[0]-hsizes[1]-offset; -#if 0 - av_log(avccontext, AV_LOG_DEBUG, - "vorbis header sizes: %d, %d, %d, / extradata_len is %d \n", - hsizes[0], hsizes[1], hsizes[2], avccontext->extradata_size); -#endif - headers[0] = extradata + offset; - headers[1] = extradata + offset + hsizes[0]; - headers[2] = extradata + offset + hsizes[0] + hsizes[1]; - } else { - av_log(avccontext, AV_LOG_ERROR, - "vorbis initial header len is wrong: %d\n", *p); - return -1; - } - - for(i=0; i<3; i++){ - context->op.b_o_s= i==0; - context->op.bytes = hsizes[i]; - context->op.packet = headers[i]; - if(vorbis_synthesis_headerin(&context->vi, &context->vc, &context->op)<0){ - av_log(avccontext, AV_LOG_ERROR, "%d. vorbis header damaged\n", i+1); - return -1; - } - } - - avccontext->channels = context->vi.channels; - avccontext->sample_rate = context->vi.rate; - avccontext->time_base= (AVRational){1, avccontext->sample_rate}; - - vorbis_synthesis_init(&context->vd, &context->vi); - vorbis_block_init(&context->vd, &context->vb); - - return 0 ; -} - - -static inline int conv(int samples, float **pcm, char *buf, int channels) { - int i, j, val ; - ogg_int16_t *ptr, *data = (ogg_int16_t*)buf ; - float *mono ; - - for(i = 0 ; i < channels ; i++){ - ptr = &data[i]; - mono = pcm[i] ; - - for(j = 0 ; j < samples ; j++) { - - val = mono[j] * 32767.f; - - if(val > 32767) val = 32767 ; - if(val < -32768) val = -32768 ; - - *ptr = val ; - ptr += channels; - } - } - - return 0 ; -} - - -static int oggvorbis_decode_frame(AVCodecContext *avccontext, - void *data, int *data_size, - uint8_t *buf, int buf_size) -{ - OggVorbisContext *context = avccontext->priv_data ; - float **pcm ; - ogg_packet *op= &context->op; - int samples, total_samples, total_bytes; - - if(!buf_size){ - //FIXME flush - return 0; - } - - op->packet = buf; - op->bytes = buf_size; - -// av_log(avccontext, AV_LOG_DEBUG, "%d %d %d %"PRId64" %"PRId64" %d %d\n", op->bytes, op->b_o_s, op->e_o_s, op->granulepos, op->packetno, buf_size, context->vi.rate); - -/* for(i=0; i<op->bytes; i++) - av_log(avccontext, AV_LOG_DEBUG, "%02X ", op->packet[i]); - av_log(avccontext, AV_LOG_DEBUG, "\n");*/ - - if(vorbis_synthesis(&context->vb, op) == 0) - vorbis_synthesis_blockin(&context->vd, &context->vb) ; - - total_samples = 0 ; - total_bytes = 0 ; - - while((samples = vorbis_synthesis_pcmout(&context->vd, &pcm)) > 0) { - conv(samples, pcm, (char*)data + total_bytes, context->vi.channels) ; - total_bytes += samples * 2 * context->vi.channels ; - total_samples += samples ; - vorbis_synthesis_read(&context->vd, samples) ; - } - - *data_size = total_bytes ; - return buf_size ; -} - - -static int oggvorbis_decode_close(AVCodecContext *avccontext) { - OggVorbisContext *context = avccontext->priv_data ; - - vorbis_info_clear(&context->vi) ; - vorbis_comment_clear(&context->vc) ; - - return 0 ; -} - - -AVCodec oggvorbis_decoder = { - "vorbis", - CODEC_TYPE_AUDIO, - CODEC_ID_VORBIS, - sizeof(OggVorbisContext), - oggvorbis_decode_init, - NULL, - oggvorbis_decode_close, - oggvorbis_decode_frame, - .capabilities= CODEC_CAP_DELAY, -} ; |