/* * Creative Voice File muxer. * Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.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 */ #include "voc.h" typedef struct voc_enc_context { int param_written; } voc_enc_context_t; static int voc_write_header(AVFormatContext *s) { ByteIOContext *pb = s->pb; const int header_size = 26; const int version = 0x0114; if (s->nb_streams != 1 || s->streams[0]->codec->codec_type != CODEC_TYPE_AUDIO) return AVERROR_PATCHWELCOME; put_buffer(pb, voc_magic, sizeof(voc_magic) - 1); put_le16(pb, header_size); put_le16(pb, version); put_le16(pb, ~version + 0x1234); return 0; } static int voc_write_packet(AVFormatContext *s, AVPacket *pkt) { voc_enc_context_t *voc = s->priv_data; AVCodecContext *enc = s->streams[0]->codec; ByteIOContext *pb = s->pb; if (!voc->param_written) { if (enc->codec_tag > 0xFF) { put_byte(pb, VOC_TYPE_NEW_VOICE_DATA); put_le24(pb, pkt->size + 12); put_le32(pb, enc->sample_rate); put_byte(pb, enc->bits_per_sample); put_byte(pb, enc->channels); put_le16(pb, enc->codec_tag); put_le32(pb, 0); } else { if (s->streams[0]->codec->channels > 1) { put_byte(pb, VOC_TYPE_EXTENDED); put_le24(pb, 4); put_le16(pb, 65536-256000000/(enc->sample_rate*enc->channels)); put_byte(pb, enc->codec_tag); put_byte(pb, enc->channels - 1); } put_byte(pb, VOC_TYPE_VOICE_DATA); put_le24(pb, pkt->size + 2); put_byte(pb, 256 - 1000000 / enc->sample_rate); put_byte(pb, enc->codec_tag); } voc->param_written = 1; } else { put_byte(pb, VOC_TYPE_VOICE_DATA_CONT); put_le24(pb, pkt->size); } put_buffer(pb, pkt->data, pkt->size); return 0; } static int voc_write_trailer(AVFormatContext *s) { put_byte(s->pb, 0); return 0; } AVOutputFormat voc_muxer = { "voc", NULL_IF_CONFIG_SMALL("Creative Voice file format"), "audio/x-voc", "voc", sizeof(voc_enc_context_t), CODEC_ID_PCM_U8, CODEC_ID_NONE, voc_write_header, voc_write_packet, voc_write_trailer, .codec_tag=(const AVCodecTag*[]){voc_codec_tags, 0}, };