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111 lines
3.3 KiB
111 lines
3.3 KiB
/* |
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* copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org> |
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* |
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* This library 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 of the License, or (at your option) any later version. |
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* |
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* This library 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 this library; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file vorbis_enc.c |
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* Native Vorbis encoder. |
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* @author Oded Shimon <ods15@ods15.dyndns.org> |
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*/ |
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#include "avcodec.h" |
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#undef NDEBUG |
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#include <assert.h> |
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#define VORBIS_FRAME_SIZE 64 |
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#define BUFFER_SIZE (1024*64) |
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typedef struct { |
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uint8_t buffer[BUFFER_SIZE]; |
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int buffer_index; |
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} venc_context_t; |
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static int vorbis_encode_init(AVCodecContext * avccontext) |
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{ |
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venc_context_t * venc = avccontext->priv_data; |
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uint8_t *p; |
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unsigned int offset, len; |
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avccontext->channels; |
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avccontext->sample_rate; |
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//if (avccontext->flags & CODEC_FLAG_QSCALE) avccontext->global_quality / (float)FF_QP2LAMBDA); else avccontext->bit_rate; |
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//if(avccontext->cutoff > 0) cfreq = avccontext->cutoff / 1000.0; |
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len = header.bytes + header_comm.bytes + header_code.bytes; |
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avccontext->extradata_size = 64 + len + len/255; |
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p = avccontext->extradata = av_mallocz(avccontext->extradata_size); |
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p[0] = 2; |
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offset = 1; |
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offset += av_xiphlacing(&p[offset], header.bytes); |
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offset += av_xiphlacing(&p[offset], header_comm.bytes); |
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memcpy(&p[offset], header.packet, header.bytes); |
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offset += header.bytes; |
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memcpy(&p[offset], header_comm.packet, header_comm.bytes); |
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offset += header_comm.bytes; |
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memcpy(&p[offset], header_code.packet, header_code.bytes); |
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offset += header_code.bytes; |
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avccontext->extradata_size = offset; |
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avccontext->extradata = av_realloc(avccontext->extradata, avccontext->extradata_size); |
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avccontext->frame_size = VORBIS_FRAME_SIZE; |
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avccontext->coded_frame = avcodec_alloc_frame(); |
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avccontext->coded_frame->key_frame = 1; |
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return 0; |
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} |
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static int vorbis_encode_frame(AVCodecContext * avccontext, unsigned char * packets, int buf_size, void *data) |
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{ |
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venc_context_t * venc = avccontext->priv_data; |
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signed short * audio = data; |
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int l, samples = data ? VORBIS_FRAME_SIZE : 0; |
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if (!l) return 0; |
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avccontext->coded_frame->pts = av_rescale_q(op2->granulepos, (AVRational){1, avccontext->sample_rate}, avccontext->time_base); |
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memcpy(packets, compressed_frame, l); |
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return l; |
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} |
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static int vorbis_encode_close(AVCodecContext * avccontext) |
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{ |
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venc_context_t * venc = avccontext->priv_data; |
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av_freep(&avccontext->coded_frame); |
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av_freep(&avccontext->extradata); |
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return 0 ; |
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} |
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AVCodec oggvorbis_encoder = { |
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"vorbis", |
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CODEC_TYPE_AUDIO, |
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CODEC_ID_VORBIS, |
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sizeof(venc_context_t), |
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vorbis_encode_init, |
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vorbis_encode_frame, |
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vorbis_encode_close, |
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.capabilities= CODEC_CAP_DELAY, |
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};
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