diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/vocdec.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/vocdec.c | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/contrib/ffmpeg/libavformat/vocdec.c b/contrib/ffmpeg/libavformat/vocdec.c deleted file mode 100644 index 85d304dff..000000000 --- a/contrib/ffmpeg/libavformat/vocdec.c +++ /dev/null @@ -1,155 +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 St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "voc.h" - - - - -static int voc_probe(AVProbeData *p) -{ - int version, check; - - if (p->buf_size < 26) - return 0; - if (memcmp(p->buf, voc_magic, sizeof(voc_magic) - 1)) - return 0; - version = p->buf[22] | (p->buf[23] << 8); - check = p->buf[24] | (p->buf[25] << 8); - if (~version + 0x1234 != check) - return 10; - - return AVPROBE_SCORE_MAX; -} - -static int voc_read_header(AVFormatContext *s, AVFormatParameters *ap) -{ - voc_dec_context_t *voc = s->priv_data; - ByteIOContext *pb = &s->pb; - int header_size; - AVStream *st; - - url_fskip(pb, 20); - header_size = get_le16(pb) - 22; - if (header_size != 4) { - av_log(s, AV_LOG_ERROR, "unknown header size: %d\n", header_size); - return AVERROR_NOTSUPP; - } - url_fskip(pb, header_size); - st = av_new_stream(s, 0); - if (!st) - return AVERROR_NOMEM; - st->codec->codec_type = CODEC_TYPE_AUDIO; - - voc->remaining_size = 0; - return 0; -} - -int -voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size) -{ - voc_dec_context_t *voc = s->priv_data; - AVCodecContext *dec = st->codec; - ByteIOContext *pb = &s->pb; - voc_type_t type; - int size; - int sample_rate = 0; - int channels = 1; - - while (!voc->remaining_size) { - type = get_byte(pb); - if (type == VOC_TYPE_EOF) - return AVERROR_IO; - voc->remaining_size = get_le24(pb); - max_size -= 4; - - switch (type) { - case VOC_TYPE_VOICE_DATA: - dec->sample_rate = 1000000 / (256 - get_byte(pb)); - if (sample_rate) - dec->sample_rate = sample_rate; - dec->channels = channels; - dec->codec_id = codec_get_id(voc_codec_tags, get_byte(pb)); - dec->bits_per_sample = av_get_bits_per_sample(dec->codec_id); - voc->remaining_size -= 2; - max_size -= 2; - channels = 1; - break; - - case VOC_TYPE_VOICE_DATA_CONT: - break; - - case VOC_TYPE_EXTENDED: - sample_rate = get_le16(pb); - get_byte(pb); - channels = get_byte(pb) + 1; - sample_rate = 256000000 / (channels * (65536 - sample_rate)); - voc->remaining_size = 0; - max_size -= 4; - break; - - case VOC_TYPE_NEW_VOICE_DATA: - dec->sample_rate = get_le32(pb); - dec->bits_per_sample = get_byte(pb); - dec->channels = get_byte(pb); - dec->codec_id = codec_get_id(voc_codec_tags, get_le16(pb)); - url_fskip(pb, 4); - voc->remaining_size -= 12; - max_size -= 12; - break; - - default: - url_fskip(pb, voc->remaining_size); - max_size -= voc->remaining_size; - voc->remaining_size = 0; - break; - } - } - - dec->bit_rate = dec->sample_rate * dec->bits_per_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 voc_get_packet(s, pkt, s->streams[0], 0); -} - -static int voc_read_close(AVFormatContext *s) -{ - return 0; -} - -AVInputFormat voc_demuxer = { - "voc", - "Creative Voice File format", - sizeof(voc_dec_context_t), - voc_probe, - voc_read_header, - voc_read_packet, - voc_read_close, - .codec_tag=(const AVCodecTag*[]){voc_codec_tags, 0}, -}; |