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(e)ac3dec: set AV_FRAME_DATA_MATRIXENCODING side data.

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Tim Walker 2013-12-11 02:03:35 +00:00
parent 13345fc1f8
commit 7840c40445
1 changed files with 30 additions and 0 deletions
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30
libavcodec/ac3dec.c
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@ -1296,6 +1296,7 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data,
int blk, ch, err, ret;
const uint8_t *channel_map;
const float *output[AC3_MAX_CHANNELS];
enum AVMatrixEncoding matrix_encoding;
/* copy input buffer to decoder context to avoid reading past the end
of the buffer, which can be caused by a damaged input stream. */
@ -1437,6 +1438,35 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data,
for (ch = 0; ch < s->out_channels; ch++)
memcpy(s->output[ch], output[ch], sizeof(**output) * AC3_BLOCK_SIZE);
/*
* AVMatrixEncoding
*
* Check whether the input layout is compatible, and make sure we're not
* downmixing (else the matrix encoding is no longer applicable).
*/
matrix_encoding = AV_MATRIX_ENCODING_NONE;
if (s->channel_mode == AC3_CHMODE_STEREO &&
s->channel_mode == (s->output_mode & ~AC3_OUTPUT_LFEON)) {
if (s->dolby_surround_mode == AC3_DSURMOD_ON)
matrix_encoding = AV_MATRIX_ENCODING_DOLBY;
else if (s->dolby_headphone_mode == AC3_DHEADPHONMOD_ON)
matrix_encoding = AV_MATRIX_ENCODING_DOLBYHEADPHONE;
} else if (s->channel_mode >= AC3_CHMODE_2F2R &&
s->channel_mode == (s->output_mode & ~AC3_OUTPUT_LFEON)) {
switch (s->dolby_surround_ex_mode) {
case AC3_DSUREXMOD_ON: // EX or PLIIx
matrix_encoding = AV_MATRIX_ENCODING_DOLBYEX;
break;
case AC3_DSUREXMOD_PLIIZ:
matrix_encoding = AV_MATRIX_ENCODING_DPLIIZ;
break;
default: // not indicated or off
break;
}
}
if ((ret = ff_side_data_update_matrix_encoding(frame, matrix_encoding)) < 0)
return ret;
*got_frame_ptr = 1;
return FFMIN(buf_size, s->frame_size);