diff options
author | Aurelien Jacobs <aurel@gnuage.org> | 2006-11-21 16:08:04 +0300 |
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committer | Aurelien Jacobs <aurel@gnuage.org> | 2006-11-21 16:08:04 +0300 |
commit | 5d244b2932c612932107ca3578ca156463a02fa9 (patch) | |
tree | 319affea7823b120ce6b5d75d3ae724ed3dfeab4 /libavformat/voc.c | |
parent | 8cc622648b2c0b07671d230465a08e119e856124 (diff) |
split voc.c into vocdec.c and vocenc.c
Originally committed as revision 7145 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavformat/voc.c')
-rw-r--r-- | libavformat/voc.c | 274 |
1 files changed, 0 insertions, 274 deletions
diff --git a/libavformat/voc.c b/libavformat/voc.c deleted file mode 100644 index b22c132d1f..0000000000 --- a/libavformat/voc.c +++ /dev/null @@ -1,274 +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 "avformat.h" -#include "riff.h" /* for CodecTag */ -#include "voc.h" - - -typedef enum voc_type { - VOC_TYPE_EOF = 0x00, - VOC_TYPE_VOICE_DATA = 0x01, - VOC_TYPE_VOICE_DATA_CONT = 0x02, - VOC_TYPE_SILENCE = 0x03, - VOC_TYPE_MARKER = 0x04, - VOC_TYPE_ASCII = 0x05, - VOC_TYPE_REPETITION_START = 0x06, - VOC_TYPE_REPETITION_END = 0x07, - VOC_TYPE_EXTENDED = 0x08, - VOC_TYPE_NEW_VOICE_DATA = 0x09, -} voc_type_t; - - -static const int voc_max_pkt_size = 2048; -static const unsigned char voc_magic[] = "Creative Voice File\x1A"; - -static const CodecTag voc_codec_tags[] = { - {CODEC_ID_PCM_U8, 0x00}, - {CODEC_ID_ADPCM_SBPRO_4, 0x01}, - {CODEC_ID_ADPCM_SBPRO_3, 0x02}, - {CODEC_ID_ADPCM_SBPRO_2, 0x03}, - {CODEC_ID_PCM_S16LE, 0x04}, - {CODEC_ID_PCM_ALAW, 0x06}, - {CODEC_ID_PCM_MULAW, 0x07}, - {CODEC_ID_ADPCM_CT, 0x0200}, - {0, 0}, -}; - - -#ifdef CONFIG_DEMUXERS - -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, "unkown 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 = voc_max_pkt_size; - 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, -}; - -#endif /* CONFIG_DEMUXERS */ - - -#ifdef CONFIG_MUXERS - -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_NOTSUPP; - - 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) { - int format = codec_get_tag(voc_codec_tags, enc->codec_id); - - if (format > 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, format); - 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, format); - 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, format); - } - 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", - "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, -}; - -#endif /* CONFIG_MUXERS */ |