/*
- * Creative Voice File demuxer.
+ * Creative Voice File common data.
* Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org>
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * Libav 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * Libav 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 this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "avformat.h"
-#include "avi.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_PCM_S16LE, 0x04},
- {CODEC_ID_PCM_ALAW, 0x06},
- {CODEC_ID_PCM_MULAW, 0x07},
- {CODEC_ID_ADPCM_CT, 0x0200},
- {0, 0},
+#include "internal.h"
+
+const unsigned char ff_voc_magic[21] = "Creative Voice File\x1A";
+
+const AVCodecTag ff_voc_codec_tags[] = {
+ {AV_CODEC_ID_PCM_U8, 0x00},
+ {AV_CODEC_ID_ADPCM_SBPRO_4, 0x01},
+ {AV_CODEC_ID_ADPCM_SBPRO_3, 0x02},
+ {AV_CODEC_ID_ADPCM_SBPRO_2, 0x03},
+ {AV_CODEC_ID_PCM_S16LE, 0x04},
+ {AV_CODEC_ID_PCM_ALAW, 0x06},
+ {AV_CODEC_ID_PCM_MULAW, 0x07},
+ {AV_CODEC_ID_ADPCM_CT, 0x0200},
+ {AV_CODEC_ID_NONE, 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));
- 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;
-}
-
-static AVInputFormat voc_iformat = {
- "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;
-}
-
-static AVOutputFormat voc_oformat = {
- "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 */
-
-
-int voc_init(void)
-{
-#ifdef CONFIG_DEMUXERS
- av_register_input_format(&voc_iformat);
-#endif /* CONFIG_DEMUXERS */
-#ifdef CONFIG_MUXERS
- av_register_output_format(&voc_oformat);
-#endif /* CONFIG_MUXERS */
- return 0;
-}
projects / ffmpeg / blobdiff