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author | Justin Ruggles <justin.ruggles@gmail.com> | 2011-08-05 16:28:39 -0400 |
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committer | Justin Ruggles <justin.ruggles@gmail.com> | 2011-08-09 16:44:34 -0400 |
commit | c3d63262fe61a8e219c4b69c61af6e0c9d49be2d (patch) | |
tree | b76585026b5f748453fe80c2ba8d2686b37dc172 | |
parent | d55ad59a8a67b73f3370ee01efd0051fbffe3577 (diff) | |
download | ffmpeg-streaming-c3d63262fe61a8e219c4b69c61af6e0c9d49be2d.zip ffmpeg-streaming-c3d63262fe61a8e219c4b69c61af6e0c9d49be2d.tar.gz |
ac3enc: allow new coupling coordinates to be sent independently for each
channel.
-rw-r--r-- | libavcodec/ac3enc.c | 10 | ||||
-rw-r--r-- | libavcodec/ac3enc.h | 2 | ||||
-rw-r--r-- | libavcodec/ac3enc_template.c | 50 | ||||
-rw-r--r-- | libavcodec/eac3enc.c | 2 |
4 files changed, 26 insertions, 38 deletions
diff --git a/libavcodec/ac3enc.c b/libavcodec/ac3enc.c index d454654..291a60d 100644 --- a/libavcodec/ac3enc.c +++ b/libavcodec/ac3enc.c @@ -864,9 +864,9 @@ static void count_frame_bits(AC3EncodeContext *s) if (block->cpl_in_use) { for (ch = 1; ch <= s->fbw_channels; ch++) { if (block->channel_in_cpl[ch]) { - if (!s->eac3 || block->new_cpl_coords != 2) + if (!s->eac3 || block->new_cpl_coords[ch] != 2) frame_bits++; - if (block->new_cpl_coords) { + if (block->new_cpl_coords[ch]) { frame_bits += 2; frame_bits += (4 + 4) * s->num_cpl_bands; } @@ -1394,9 +1394,9 @@ static void output_audio_block(AC3EncodeContext *s, int blk) if (block->cpl_in_use) { for (ch = 1; ch <= s->fbw_channels; ch++) { if (block->channel_in_cpl[ch]) { - if (!s->eac3 || block->new_cpl_coords != 2) - put_bits(&s->pb, 1, block->new_cpl_coords); - if (block->new_cpl_coords) { + if (!s->eac3 || block->new_cpl_coords[ch] != 2) + put_bits(&s->pb, 1, block->new_cpl_coords[ch]); + if (block->new_cpl_coords[ch]) { put_bits(&s->pb, 2, block->cpl_master_exp[ch]); for (bnd = 0; bnd < s->num_cpl_bands; bnd++) { put_bits(&s->pb, 4, block->cpl_coord_exp [ch][bnd]); diff --git a/libavcodec/ac3enc.h b/libavcodec/ac3enc.h index c1e69b1..98e2432 100644 --- a/libavcodec/ac3enc.h +++ b/libavcodec/ac3enc.h @@ -123,7 +123,7 @@ typedef struct AC3Block { int cpl_in_use; ///< coupling in use for this block (cplinu) uint8_t channel_in_cpl[AC3_MAX_CHANNELS]; ///< channel in coupling (chincpl) int num_cpl_channels; ///< number of channels in coupling - uint8_t new_cpl_coords; ///< send new coupling coordinates (cplcoe) + uint8_t new_cpl_coords[AC3_MAX_CHANNELS]; ///< send new coupling coordinates (cplcoe) uint8_t cpl_master_exp[AC3_MAX_CHANNELS]; ///< coupling coord master exponents (mstrcplco) int new_snr_offsets; ///< send new SNR offsets int new_cpl_leak; ///< send new coupling leak info diff --git a/libavcodec/ac3enc_template.c b/libavcodec/ac3enc_template.c index dd1e48d..4b0c768 100644 --- a/libavcodec/ac3enc_template.c +++ b/libavcodec/ac3enc_template.c @@ -206,9 +206,10 @@ static void apply_channel_coupling(AC3EncodeContext *s) for (blk = 0; blk < s->num_blocks; blk++) { AC3Block *block = &s->blocks[blk]; AC3Block *block0 = blk ? &s->blocks[blk-1] : NULL; - int new_coords = 0; CoefSumType coord_diff[AC3_MAX_CHANNELS] = {0,}; + memset(block->new_cpl_coords, 0, sizeof(block->new_cpl_coords)); + if (block->cpl_in_use) { /* calculate coupling coordinates for all blocks and calculate the average difference between coordinates in successive blocks */ @@ -233,28 +234,18 @@ static void apply_channel_coupling(AC3EncodeContext *s) * using coupling has changed from the previous block, or the * coordinate difference from the last block for any channel is * greater than a threshold value. */ - if (blk == 0) { - new_coords = 1; - } else if (!block0->cpl_in_use) { - new_coords = 1; + if (blk == 0 || !block0->cpl_in_use) { + for (ch = 1; ch <= s->fbw_channels; ch++) + block->new_cpl_coords[ch] = 1; } else { for (ch = 1; ch <= s->fbw_channels; ch++) { - if (block->channel_in_cpl[ch] && !block0->channel_in_cpl[ch]) { - new_coords = 1; - break; - } - } - if (!new_coords) { - for (ch = 1; ch <= s->fbw_channels; ch++) { - if (block->channel_in_cpl[ch] && coord_diff[ch] > 0.04) { - new_coords = 1; - break; - } + if ((block->channel_in_cpl[ch] && !block0->channel_in_cpl[ch]) || + (block->channel_in_cpl[ch] && coord_diff[ch] > 0.03)) { + block->new_cpl_coords[ch] = 1; } } } } - block->new_cpl_coords = new_coords; } /* calculate final coupling coordinates, taking into account reusing of @@ -262,8 +253,7 @@ static void apply_channel_coupling(AC3EncodeContext *s) for (bnd = 0; bnd < s->num_cpl_bands; bnd++) { blk = 0; while (blk < s->num_blocks) { - int blk1; - CoefSumType energy_cpl; + int av_uninit(blk1); AC3Block *block = &s->blocks[blk]; if (!block->cpl_in_use) { @@ -271,23 +261,18 @@ static void apply_channel_coupling(AC3EncodeContext *s) continue; } - energy_cpl = energy[blk][CPL_CH][bnd]; - blk1 = blk+1; - while (!s->blocks[blk1].new_cpl_coords && blk1 < s->num_blocks) { - if (s->blocks[blk1].cpl_in_use) - energy_cpl += energy[blk1][CPL_CH][bnd]; - blk1++; - } - for (ch = 1; ch <= s->fbw_channels; ch++) { - CoefType energy_ch; + CoefSumType energy_ch, energy_cpl; if (!block->channel_in_cpl[ch]) continue; + energy_cpl = energy[blk][CPL_CH][bnd]; energy_ch = energy[blk][ch][bnd]; blk1 = blk+1; - while (!s->blocks[blk1].new_cpl_coords && blk1 < s->num_blocks) { - if (s->blocks[blk1].cpl_in_use) + while (!s->blocks[blk1].new_cpl_coords[ch] && blk1 < s->num_blocks) { + if (s->blocks[blk1].cpl_in_use) { + energy_cpl += energy[blk1][CPL_CH][bnd]; energy_ch += energy[blk1][ch][bnd]; + } blk1++; } cpl_coords[blk][ch][bnd] = calc_cpl_coord(energy_ch, energy_cpl); @@ -299,7 +284,7 @@ static void apply_channel_coupling(AC3EncodeContext *s) /* calculate exponents/mantissas for coupling coordinates */ for (blk = 0; blk < s->num_blocks; blk++) { AC3Block *block = &s->blocks[blk]; - if (!block->cpl_in_use || !block->new_cpl_coords) + if (!block->cpl_in_use) continue; clip_coefficients(&s->dsp, cpl_coords[blk][1], s->fbw_channels * 16); @@ -313,6 +298,9 @@ static void apply_channel_coupling(AC3EncodeContext *s) for (ch = 1; ch <= s->fbw_channels; ch++) { int bnd, min_exp, max_exp, master_exp; + if (!block->new_cpl_coords[ch]) + continue; + /* determine master exponent */ min_exp = max_exp = block->cpl_coord_exp[ch][0]; for (bnd = 1; bnd < s->num_cpl_bands; bnd++) { diff --git a/libavcodec/eac3enc.c b/libavcodec/eac3enc.c index 75113b2..f3b4418 100644 --- a/libavcodec/eac3enc.c +++ b/libavcodec/eac3enc.c @@ -99,7 +99,7 @@ void ff_eac3_set_cpl_states(AC3EncodeContext *s) for (ch = 1; ch <= s->fbw_channels; ch++) { if (block->channel_in_cpl[ch]) { if (first_cpl_coords[ch]) { - block->new_cpl_coords = 2; + block->new_cpl_coords[ch] = 2; first_cpl_coords[ch] = 0; } } else { |