Author: ramiro
Date: Tue Sep 9 03:31:08 2008
New Revision: 3739
Log:
Write peak_bitrate to bitstream.
Modified:
mlp/mlpenc.c
Modified: mlp/mlpenc.c
==============================================================================
--- mlp/mlpenc.c (original)
+++ mlp/mlpenc.c Tue Sep 9 03:31:08 2008
@@ -101,6 +101,7 @@ typedef struct {
int coded_sample_fmt [2]; ///< sample format encoded for MLP
int coded_sample_rate[2]; ///< sample rate encoded for MLP
+ int coded_peak_bitrate; ///< peak bitrate for this major
sync header
int32_t *inout_buffer; ///< Pointer to data currently
being read from lavc or written to bitstream.
int32_t *major_inout_buffer; ///< Buffer with all in/out data
for one entire major frame interval.
@@ -440,6 +441,11 @@ enum InputBitDepth {
BITS_24,
};
+static int mlp_peak_bitrate(int peak_bitrate, int sample_rate)
+{
+ return ((peak_bitrate << 4) - 8) / sample_rate;
+}
+
/** Returns the coded sample_rate for MLP. */
static int mlp_sample_rate(int sample_rate)
{
@@ -482,6 +488,9 @@ static av_cold int mlp_encode_init(AVCod
}
ctx->coded_sample_rate[1] = -1 & 0xf;
+ /* TODO Keep count of bitrate and calculate real value. */
+ ctx->coded_peak_bitrate = mlp_peak_bitrate(9600000, avctx->sample_rate);
+
/* TODO support more channels. */
if (avctx->channels > 2) {
av_log(avctx, AV_LOG_ERROR,
@@ -762,9 +771,7 @@ static void write_major_sync(MLPEncodeCo
put_bits(&pb, 1, 1); /* is_vbr: This value is 1 in all tested MLP samples.
* I suppose it would be 0 only when no filters
* or codebooks are used. */
- put_bits(&pb, 15, 0); /* TODO peak_bitrate: Most MLP samples tested encode
- * a value that evaluates peak_bitrate to 9600000 or
- * a little bit less. */
+ put_bits(&pb, 15, ctx->coded_peak_bitrate);
put_bits(&pb, 4, 1); /* TODO Support more num_substreams. */
put_bits(&pb, 20, 0x1054c); /* TODO These values have something to do with
_______________________________________________
FFmpeg-soc mailing list
[email protected]
https://lists.mplayerhq.hu/mailman/listinfo/ffmpeg-soc
