#include "rawenc.h"
#include "pcm.h"
-#define AVPRIV_CODEC2_HEADER_SIZE 7
-#define AVPRIV_CODEC2_MAGIC 0xC0DEC2
+#define CODEC2_HEADER_SIZE 7
+#define CODEC2_MAGIC 0xC0DEC2
//the lowest version we should ever run across is 0.8
//we may run across later versions as the format evolves
static int codec2_probe(const AVProbeData *p)
{
//must start wih C0 DE C2
- if (AV_RB24(p->buf) != AVPRIV_CODEC2_MAGIC) {
+ if (AV_RB24(p->buf) != CODEC2_MAGIC) {
return 0;
}
return AVPROBE_SCORE_EXTENSION + 1;
}
+//Mimics codec2_samples_per_frame()
+static int codec2_mode_frame_size(AVFormatContext *s, int mode)
+{
+ int frame_size_table[CODEC2_MODE_MAX+1] = {
+ 160, // 3200
+ 160, // 2400
+ 320, // 1600
+ 320, // 1400
+ 320, // 1300
+ 320, // 1200
+ 320, // 700
+ 320, // 700B
+ 320, // 700C
+ };
+
+ if (mode < 0 || mode > CODEC2_MODE_MAX) {
+ av_log(s, AV_LOG_ERROR, "unknown codec2 mode %i, can't find frame_size\n", mode);
+ return 0;
+ } else {
+ return frame_size_table[mode];
+ }
+}
+
+//Mimics (codec2_bits_per_frame()+7)/8
+static int codec2_mode_block_align(AVFormatContext *s, int mode)
+{
+ int block_align_table[CODEC2_MODE_MAX+1] = {
+ 8, // 3200
+ 6, // 2400
+ 8, // 1600
+ 7, // 1400
+ 7, // 1300
+ 6, // 1200
+ 4, // 700
+ 4, // 700B
+ 4, // 700C
+ };
+
+ if (mode < 0 || mode > CODEC2_MODE_MAX) {
+ av_log(s, AV_LOG_ERROR, "unknown codec2 mode %i, can't find block_align\n", mode);
+ return 0;
+ } else {
+ return block_align_table[mode];
+ }
+}
+
+//Computes bitrate from mode, with frames rounded up to the nearest octet.
+//So 700 bit/s (28 bits/frame) becomes 800 bits/s (32 bits/frame).
+static int codec2_mode_bit_rate(AVFormatContext *s, int mode)
+{
+ int frame_size = codec2_mode_frame_size(s, mode);
+ int block_align = codec2_mode_block_align(s, mode);
+
+ if (frame_size <= 0 || block_align <= 0) {
+ return 0;
+ }
+
+ return 8 * 8000 * block_align / frame_size;
+}
+
static int codec2_read_header_common(AVFormatContext *s, AVStream *st)
{
- int mode = avpriv_codec2_mode_from_extradata(st->codecpar->extradata);
+ int mode = codec2_mode_from_extradata(st->codecpar->extradata);
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = AV_CODEC_ID_CODEC2;
st->codecpar->channels = 1;
st->codecpar->format = AV_SAMPLE_FMT_S16;
st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
- st->codecpar->bit_rate = avpriv_codec2_mode_bit_rate(s, mode);
- st->codecpar->frame_size = avpriv_codec2_mode_frame_size(s, mode);
- st->codecpar->block_align = avpriv_codec2_mode_block_align(s, mode);
+ st->codecpar->bit_rate = codec2_mode_bit_rate(s, mode);
+ st->codecpar->frame_size = codec2_mode_frame_size(s, mode);
+ st->codecpar->block_align = codec2_mode_block_align(s, mode);
if (st->codecpar->bit_rate <= 0 ||
st->codecpar->frame_size <= 0 ||
return AVERROR(ENOMEM);
}
- if (avio_rb24(s->pb) != AVPRIV_CODEC2_MAGIC) {
+ if (avio_rb24(s->pb) != CODEC2_MAGIC) {
av_log(s, AV_LOG_ERROR, "not a .c2 file\n");
return AVERROR_INVALIDDATA;
}
- ret = ff_alloc_extradata(st->codecpar, AVPRIV_CODEC2_EXTRADATA_SIZE);
+ ret = ff_alloc_extradata(st->codecpar, CODEC2_EXTRADATA_SIZE);
if (ret) {
return ret;
}
- ret = ffio_read_size(s->pb, st->codecpar->extradata, AVPRIV_CODEC2_EXTRADATA_SIZE);
+ ret = ffio_read_size(s->pb, st->codecpar->extradata, CODEC2_EXTRADATA_SIZE);
if (ret < 0) {
return ret;
}
- version = avpriv_codec2_version_from_extradata(st->codecpar->extradata);
+ version = AV_RB16(st->codecpar->extradata);
if ((version >> 8) != EXPECTED_CODEC2_MAJOR_VERSION) {
avpriv_report_missing_feature(s, "Major version %i", version >> 8);
return AVERROR_PATCHWELCOME;
}
- s->internal->data_offset = AVPRIV_CODEC2_HEADER_SIZE;
+ s->internal->data_offset = CODEC2_HEADER_SIZE;
return codec2_read_header_common(s, st);
}
st = s->streams[0];
- if (st->codecpar->extradata_size != AVPRIV_CODEC2_EXTRADATA_SIZE) {
+ if (st->codecpar->extradata_size != CODEC2_EXTRADATA_SIZE) {
av_log(s, AV_LOG_ERROR, ".c2 files require exactly %i bytes of extradata (got %i)\n",
- AVPRIV_CODEC2_EXTRADATA_SIZE, st->codecpar->extradata_size);
+ CODEC2_EXTRADATA_SIZE, st->codecpar->extradata_size);
return AVERROR(EINVAL);
}
- avio_wb24(s->pb, AVPRIV_CODEC2_MAGIC);
- avio_write(s->pb, st->codecpar->extradata, AVPRIV_CODEC2_EXTRADATA_SIZE);
+ avio_wb24(s->pb, CODEC2_MAGIC);
+ avio_write(s->pb, st->codecpar->extradata, CODEC2_EXTRADATA_SIZE);
return 0;
}
return AVERROR(ENOMEM);
}
- ret = ff_alloc_extradata(st->codecpar, AVPRIV_CODEC2_EXTRADATA_SIZE);
+ ret = ff_alloc_extradata(st->codecpar, CODEC2_EXTRADATA_SIZE);
if (ret) {
return ret;
}
s->internal->data_offset = 0;
- avpriv_codec2_make_extradata(st->codecpar->extradata, c2->mode);
+ codec2_make_extradata(st->codecpar->extradata, c2->mode);
return codec2_read_header_common(s, st);
}
};
static const AVOption codec2raw_options[] = {
- AVPRIV_CODEC2_AVOPTIONS("codec2 mode [mandatory]", Codec2Context, -1, -1, AV_OPT_FLAG_DECODING_PARAM),
+ CODEC2_AVOPTIONS("codec2 mode [mandatory]", Codec2Context, -1, -1, AV_OPT_FLAG_DECODING_PARAM),
FRAMES_PER_PACKET,
{ NULL },
};
};
#if CONFIG_CODEC2_DEMUXER
-AVInputFormat ff_codec2_demuxer = {
+const AVInputFormat ff_codec2_demuxer = {
.name = "codec2",
.long_name = NULL_IF_CONFIG_SMALL("codec2 .c2 demuxer"),
.priv_data_size = sizeof(Codec2Context),
#endif
#if CONFIG_CODEC2_MUXER
-AVOutputFormat ff_codec2_muxer = {
+const AVOutputFormat ff_codec2_muxer = {
.name = "codec2",
.long_name = NULL_IF_CONFIG_SMALL("codec2 .c2 muxer"),
.priv_data_size = sizeof(Codec2Context),
#endif
#if CONFIG_CODEC2RAW_DEMUXER
-AVInputFormat ff_codec2raw_demuxer = {
+const AVInputFormat ff_codec2raw_demuxer = {
.name = "codec2raw",
.long_name = NULL_IF_CONFIG_SMALL("raw codec2 demuxer"),
.priv_data_size = sizeof(Codec2Context),