diff options
Diffstat (limited to 'libavcodec/ac3enc_template.c')
| -rw-r--r-- | libavcodec/ac3enc_template.c | 33 |
1 files changed, 13 insertions, 20 deletions
diff --git a/libavcodec/ac3enc_template.c b/libavcodec/ac3enc_template.c index 388d75377e..904e0bb9ef 100644 --- a/libavcodec/ac3enc_template.c +++ b/libavcodec/ac3enc_template.c @@ -4,20 +4,20 @@ * Copyright (c) 2006-2011 Justin Ruggles <justin.ruggles@gmail.com> * Copyright (c) 2006-2010 Prakash Punnoor <prakash@punnoor.de> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * Libav is distributed in the hope that it will be useful, + * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -43,6 +43,9 @@ static void clip_coefficients(DSPContext *dsp, CoefType *coef, unsigned int len) static CoefType calc_cpl_coord(CoefSumType energy_ch, CoefSumType energy_cpl); +static void sum_square_butterfly(AC3EncodeContext *s, CoefSumType sum[4], + const CoefType *coef0, const CoefType *coef1, + int len); int AC3_NAME(allocate_sample_buffers)(AC3EncodeContext *s) { @@ -66,7 +69,7 @@ alloc_fail: /* * Copy input samples. - * Channels are reordered from Libav's default order to AC-3 order. + * Channels are reordered from FFmpeg's default order to AC-3 order. */ static void copy_input_samples(AC3EncodeContext *s, SampleType **samples) { @@ -332,7 +335,7 @@ static void apply_channel_coupling(AC3EncodeContext *s) static void compute_rematrixing_strategy(AC3EncodeContext *s) { int nb_coefs; - int blk, bnd, i; + int blk, bnd; AC3Block *block, *block0; if (s->channel_mode != AC3_CHMODE_STEREO) @@ -360,17 +363,9 @@ static void compute_rematrixing_strategy(AC3EncodeContext *s) /* calculate calculate sum of squared coeffs for one band in one block */ int start = ff_ac3_rematrix_band_tab[bnd]; int end = FFMIN(nb_coefs, ff_ac3_rematrix_band_tab[bnd+1]); - CoefSumType sum[4] = {0,}; - for (i = start; i < end; i++) { - CoefType lt = block->mdct_coef[1][i]; - CoefType rt = block->mdct_coef[2][i]; - CoefType md = lt + rt; - CoefType sd = lt - rt; - MAC_COEF(sum[0], lt, lt); - MAC_COEF(sum[1], rt, rt); - MAC_COEF(sum[2], md, md); - MAC_COEF(sum[3], sd, sd); - } + CoefSumType sum[4]; + sum_square_butterfly(s, sum, block->mdct_coef[1] + start, + block->mdct_coef[2] + start, end - start); /* compare sums to determine if rematrixing will be used for this band */ if (FFMIN(sum[2], sum[3]) < FFMIN(sum[0], sum[1])) @@ -439,10 +434,8 @@ int AC3_NAME(encode_frame)(AVCodecContext *avctx, AVPacket *avpkt, ff_ac3_quantize_mantissas(s); - if ((ret = ff_alloc_packet(avpkt, s->frame_size))) { - av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n"); + if ((ret = ff_alloc_packet2(avctx, avpkt, s->frame_size))) return ret; - } ff_ac3_output_frame(s, avpkt->data); if (frame->pts != AV_NOPTS_VALUE) |