diff options
Diffstat (limited to 'ffmpeg/libavformat/vocdec.c')
| -rw-r--r-- | ffmpeg/libavformat/vocdec.c | 175 |
1 files changed, 0 insertions, 175 deletions
diff --git a/ffmpeg/libavformat/vocdec.c b/ffmpeg/libavformat/vocdec.c deleted file mode 100644 index 0b6b5a5..0000000 --- a/ffmpeg/libavformat/vocdec.c +++ /dev/null @@ -1,175 +0,0 @@ -/* - * Creative Voice File demuxer. - * 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 "libavutil/intreadwrite.h" -#include "voc.h" -#include "internal.h" - - -static int voc_probe(AVProbeData *p) -{ - int version, check; - - if (memcmp(p->buf, ff_voc_magic, sizeof(ff_voc_magic) - 1)) - return 0; - version = AV_RL16(p->buf + 22); - check = AV_RL16(p->buf + 24); - if (~version + 0x1234 != check) - return 10; - - return AVPROBE_SCORE_MAX; -} - -static int voc_read_header(AVFormatContext *s) -{ - VocDecContext *voc = s->priv_data; - AVIOContext *pb = s->pb; - int header_size; - AVStream *st; - - avio_skip(pb, 20); - header_size = avio_rl16(pb) - 22; - if (header_size != 4) { - av_log(s, AV_LOG_ERROR, "unknown header size: %d\n", header_size); - return AVERROR(ENOSYS); - } - avio_skip(pb, header_size); - st = avformat_new_stream(s, NULL); - if (!st) - return AVERROR(ENOMEM); - st->codec->codec_type = AVMEDIA_TYPE_AUDIO; - - voc->remaining_size = 0; - return 0; -} - -int -ff_voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size) -{ - VocDecContext *voc = s->priv_data; - AVCodecContext *dec = st->codec; - AVIOContext *pb = s->pb; - VocType type; - int size, tmp_codec=-1; - int sample_rate = 0; - int channels = 1; - - while (!voc->remaining_size) { - type = avio_r8(pb); - if (type == VOC_TYPE_EOF) - return AVERROR_EOF; - voc->remaining_size = avio_rl24(pb); - if (!voc->remaining_size) { - if (!s->pb->seekable) - return AVERROR(EIO); - voc->remaining_size = avio_size(pb) - avio_tell(pb); - } - max_size -= 4; - - switch (type) { - case VOC_TYPE_VOICE_DATA: - if (!dec->sample_rate) { - dec->sample_rate = 1000000 / (256 - avio_r8(pb)); - if (sample_rate) - dec->sample_rate = sample_rate; - avpriv_set_pts_info(st, 64, 1, dec->sample_rate); - dec->channels = channels; - dec->bits_per_coded_sample = av_get_bits_per_sample(dec->codec_id); - } else - avio_skip(pb, 1); - tmp_codec = avio_r8(pb); - voc->remaining_size -= 2; - max_size -= 2; - channels = 1; - break; - - case VOC_TYPE_VOICE_DATA_CONT: - break; - - case VOC_TYPE_EXTENDED: - sample_rate = avio_rl16(pb); - avio_r8(pb); - channels = avio_r8(pb) + 1; - sample_rate = 256000000 / (channels * (65536 - sample_rate)); - voc->remaining_size = 0; - max_size -= 4; - break; - - case VOC_TYPE_NEW_VOICE_DATA: - if (!dec->sample_rate) { - dec->sample_rate = avio_rl32(pb); - avpriv_set_pts_info(st, 64, 1, dec->sample_rate); - dec->bits_per_coded_sample = avio_r8(pb); - dec->channels = avio_r8(pb); - } else - avio_skip(pb, 6); - tmp_codec = avio_rl16(pb); - avio_skip(pb, 4); - voc->remaining_size -= 12; - max_size -= 12; - break; - - default: - avio_skip(pb, voc->remaining_size); - max_size -= voc->remaining_size; - voc->remaining_size = 0; - break; - } - } - - if (tmp_codec >= 0) { - tmp_codec = ff_codec_get_id(ff_voc_codec_tags, tmp_codec); - if (dec->codec_id == AV_CODEC_ID_NONE) - dec->codec_id = tmp_codec; - else if (dec->codec_id != tmp_codec) - av_log(s, AV_LOG_WARNING, "Ignoring mid-stream change in audio codec\n"); - if (dec->codec_id == AV_CODEC_ID_NONE) { - if (s->audio_codec_id == AV_CODEC_ID_NONE) { - av_log(s, AV_LOG_ERROR, "unknown codec tag\n"); - return AVERROR(EINVAL); - } - av_log(s, AV_LOG_WARNING, "unknown codec tag\n"); - } - } - - dec->bit_rate = dec->sample_rate * dec->channels * dec->bits_per_coded_sample; - - if (max_size <= 0) - max_size = 2048; - size = FFMIN(voc->remaining_size, max_size); - voc->remaining_size -= size; - return av_get_packet(pb, pkt, size); -} - -static int voc_read_packet(AVFormatContext *s, AVPacket *pkt) -{ - return ff_voc_get_packet(s, pkt, s->streams[0], 0); -} - -AVInputFormat ff_voc_demuxer = { - .name = "voc", - .long_name = NULL_IF_CONFIG_SMALL("Creative Voice"), - .priv_data_size = sizeof(VocDecContext), - .read_probe = voc_probe, - .read_header = voc_read_header, - .read_packet = voc_read_packet, - .codec_tag = (const AVCodecTag* const []){ ff_voc_codec_tags, 0 }, -}; |