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 = codec2_mode_from_extradata(st->codecpar->extradata);
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 ||