avformat/riffdec: Initialize bitrate
[ffmpeg.git] / libavformat / voc.c
index b22c132..2a97234 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Creative Voice File demuxer.
+ * Creative Voice File common data.
  * Copyright (c) 2006  Aurelien Jacobs <aurel@gnuage.org>
  *
  * This file is part of FFmpeg.
  *
  * 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
+ * Foundation, Inc., 51 Franklin Street, 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,
+#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},
 };
-
-#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 */