mirror of
https://github.com/FFmpeg/FFmpeg.git
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9bcc430481
* commit '088eca28164c8cd3b72b0c3d3f9e3fe5ee5cb28f': avresample: prevent theoretical division by zero Merged-by: Michael Niedermayer <michaelni@gmx.at>
793 lines
28 KiB
C
793 lines
28 KiB
C
/*
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* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/common.h"
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#include "libavutil/dict.h"
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// #include "libavutil/error.h"
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#include "libavutil/frame.h"
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#include "libavutil/log.h"
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#include "libavutil/mem.h"
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#include "libavutil/opt.h"
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#include "avresample.h"
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#include "internal.h"
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#include "audio_data.h"
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#include "audio_convert.h"
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#include "audio_mix.h"
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#include "resample.h"
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int avresample_open(AVAudioResampleContext *avr)
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{
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int ret;
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if (avresample_is_open(avr)) {
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av_log(avr, AV_LOG_ERROR, "The resampling context is already open.\n");
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return AVERROR(EINVAL);
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}
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/* set channel mixing parameters */
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avr->in_channels = av_get_channel_layout_nb_channels(avr->in_channel_layout);
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if (avr->in_channels <= 0 || avr->in_channels > AVRESAMPLE_MAX_CHANNELS) {
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av_log(avr, AV_LOG_ERROR, "Invalid input channel layout: %"PRIu64"\n",
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avr->in_channel_layout);
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return AVERROR(EINVAL);
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}
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avr->out_channels = av_get_channel_layout_nb_channels(avr->out_channel_layout);
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if (avr->out_channels <= 0 || avr->out_channels > AVRESAMPLE_MAX_CHANNELS) {
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av_log(avr, AV_LOG_ERROR, "Invalid output channel layout: %"PRIu64"\n",
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avr->out_channel_layout);
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return AVERROR(EINVAL);
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}
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avr->resample_channels = FFMIN(avr->in_channels, avr->out_channels);
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avr->downmix_needed = avr->in_channels > avr->out_channels;
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avr->upmix_needed = avr->out_channels > avr->in_channels ||
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(!avr->downmix_needed && (avr->mix_matrix ||
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avr->in_channel_layout != avr->out_channel_layout));
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avr->mixing_needed = avr->downmix_needed || avr->upmix_needed;
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/* set resampling parameters */
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avr->resample_needed = avr->in_sample_rate != avr->out_sample_rate ||
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avr->force_resampling;
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/* select internal sample format if not specified by the user */
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if (avr->internal_sample_fmt == AV_SAMPLE_FMT_NONE &&
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(avr->mixing_needed || avr->resample_needed)) {
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enum AVSampleFormat in_fmt = av_get_planar_sample_fmt(avr->in_sample_fmt);
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enum AVSampleFormat out_fmt = av_get_planar_sample_fmt(avr->out_sample_fmt);
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int max_bps = FFMAX(av_get_bytes_per_sample(in_fmt),
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av_get_bytes_per_sample(out_fmt));
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if (max_bps <= 2) {
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avr->internal_sample_fmt = AV_SAMPLE_FMT_S16P;
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} else if (avr->mixing_needed) {
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avr->internal_sample_fmt = AV_SAMPLE_FMT_FLTP;
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} else {
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if (max_bps <= 4) {
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if (in_fmt == AV_SAMPLE_FMT_S32P ||
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out_fmt == AV_SAMPLE_FMT_S32P) {
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if (in_fmt == AV_SAMPLE_FMT_FLTP ||
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out_fmt == AV_SAMPLE_FMT_FLTP) {
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/* if one is s32 and the other is flt, use dbl */
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avr->internal_sample_fmt = AV_SAMPLE_FMT_DBLP;
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} else {
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/* if one is s32 and the other is s32, s16, or u8, use s32 */
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avr->internal_sample_fmt = AV_SAMPLE_FMT_S32P;
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}
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} else {
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/* if one is flt and the other is flt, s16 or u8, use flt */
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avr->internal_sample_fmt = AV_SAMPLE_FMT_FLTP;
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}
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} else {
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/* if either is dbl, use dbl */
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avr->internal_sample_fmt = AV_SAMPLE_FMT_DBLP;
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}
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}
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av_log(avr, AV_LOG_DEBUG, "Using %s as internal sample format\n",
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av_get_sample_fmt_name(avr->internal_sample_fmt));
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}
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/* we may need to add an extra conversion in order to remap channels if
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the output format is not planar */
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if (avr->use_channel_map && !avr->mixing_needed && !avr->resample_needed &&
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!ff_sample_fmt_is_planar(avr->out_sample_fmt, avr->out_channels)) {
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avr->internal_sample_fmt = av_get_planar_sample_fmt(avr->out_sample_fmt);
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}
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/* set sample format conversion parameters */
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if (avr->resample_needed || avr->mixing_needed)
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avr->in_convert_needed = avr->in_sample_fmt != avr->internal_sample_fmt;
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else
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avr->in_convert_needed = avr->use_channel_map &&
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!ff_sample_fmt_is_planar(avr->out_sample_fmt, avr->out_channels);
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if (avr->resample_needed || avr->mixing_needed || avr->in_convert_needed)
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avr->out_convert_needed = avr->internal_sample_fmt != avr->out_sample_fmt;
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else
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avr->out_convert_needed = avr->in_sample_fmt != avr->out_sample_fmt;
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avr->in_copy_needed = !avr->in_convert_needed && (avr->mixing_needed ||
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(avr->use_channel_map && avr->resample_needed));
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if (avr->use_channel_map) {
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if (avr->in_copy_needed) {
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avr->remap_point = REMAP_IN_COPY;
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av_dlog(avr, "remap channels during in_copy\n");
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} else if (avr->in_convert_needed) {
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avr->remap_point = REMAP_IN_CONVERT;
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av_dlog(avr, "remap channels during in_convert\n");
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} else if (avr->out_convert_needed) {
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avr->remap_point = REMAP_OUT_CONVERT;
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av_dlog(avr, "remap channels during out_convert\n");
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} else {
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avr->remap_point = REMAP_OUT_COPY;
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av_dlog(avr, "remap channels during out_copy\n");
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}
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#ifdef DEBUG
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{
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int ch;
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av_dlog(avr, "output map: ");
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if (avr->ch_map_info.do_remap)
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for (ch = 0; ch < avr->in_channels; ch++)
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av_dlog(avr, " % 2d", avr->ch_map_info.channel_map[ch]);
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else
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av_dlog(avr, "n/a");
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av_dlog(avr, "\n");
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av_dlog(avr, "copy map: ");
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if (avr->ch_map_info.do_copy)
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for (ch = 0; ch < avr->in_channels; ch++)
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av_dlog(avr, " % 2d", avr->ch_map_info.channel_copy[ch]);
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else
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av_dlog(avr, "n/a");
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av_dlog(avr, "\n");
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av_dlog(avr, "zero map: ");
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if (avr->ch_map_info.do_zero)
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for (ch = 0; ch < avr->in_channels; ch++)
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av_dlog(avr, " % 2d", avr->ch_map_info.channel_zero[ch]);
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else
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av_dlog(avr, "n/a");
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av_dlog(avr, "\n");
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av_dlog(avr, "input map: ");
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for (ch = 0; ch < avr->in_channels; ch++)
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av_dlog(avr, " % 2d", avr->ch_map_info.input_map[ch]);
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av_dlog(avr, "\n");
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}
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#endif
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} else
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avr->remap_point = REMAP_NONE;
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/* allocate buffers */
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if (avr->in_copy_needed || avr->in_convert_needed) {
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avr->in_buffer = ff_audio_data_alloc(FFMAX(avr->in_channels, avr->out_channels),
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0, avr->internal_sample_fmt,
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"in_buffer");
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if (!avr->in_buffer) {
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ret = AVERROR(EINVAL);
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goto error;
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}
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}
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if (avr->resample_needed) {
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avr->resample_out_buffer = ff_audio_data_alloc(avr->out_channels,
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1024, avr->internal_sample_fmt,
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"resample_out_buffer");
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if (!avr->resample_out_buffer) {
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ret = AVERROR(EINVAL);
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goto error;
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}
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}
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if (avr->out_convert_needed) {
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avr->out_buffer = ff_audio_data_alloc(avr->out_channels, 0,
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avr->out_sample_fmt, "out_buffer");
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if (!avr->out_buffer) {
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ret = AVERROR(EINVAL);
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goto error;
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}
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}
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avr->out_fifo = av_audio_fifo_alloc(avr->out_sample_fmt, avr->out_channels,
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1024);
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if (!avr->out_fifo) {
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ret = AVERROR(ENOMEM);
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goto error;
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}
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/* setup contexts */
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if (avr->in_convert_needed) {
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avr->ac_in = ff_audio_convert_alloc(avr, avr->internal_sample_fmt,
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avr->in_sample_fmt, avr->in_channels,
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avr->in_sample_rate,
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avr->remap_point == REMAP_IN_CONVERT);
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if (!avr->ac_in) {
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ret = AVERROR(ENOMEM);
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goto error;
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}
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}
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if (avr->out_convert_needed) {
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enum AVSampleFormat src_fmt;
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if (avr->in_convert_needed)
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src_fmt = avr->internal_sample_fmt;
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else
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src_fmt = avr->in_sample_fmt;
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avr->ac_out = ff_audio_convert_alloc(avr, avr->out_sample_fmt, src_fmt,
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avr->out_channels,
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avr->out_sample_rate,
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avr->remap_point == REMAP_OUT_CONVERT);
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if (!avr->ac_out) {
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ret = AVERROR(ENOMEM);
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goto error;
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}
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}
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if (avr->resample_needed) {
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avr->resample = ff_audio_resample_init(avr);
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if (!avr->resample) {
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ret = AVERROR(ENOMEM);
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goto error;
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}
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}
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if (avr->mixing_needed) {
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avr->am = ff_audio_mix_alloc(avr);
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if (!avr->am) {
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ret = AVERROR(ENOMEM);
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goto error;
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}
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}
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return 0;
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error:
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avresample_close(avr);
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return ret;
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}
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int avresample_is_open(AVAudioResampleContext *avr)
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{
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return !!avr->out_fifo;
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}
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void avresample_close(AVAudioResampleContext *avr)
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{
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ff_audio_data_free(&avr->in_buffer);
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ff_audio_data_free(&avr->resample_out_buffer);
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ff_audio_data_free(&avr->out_buffer);
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av_audio_fifo_free(avr->out_fifo);
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avr->out_fifo = NULL;
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ff_audio_convert_free(&avr->ac_in);
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ff_audio_convert_free(&avr->ac_out);
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ff_audio_resample_free(&avr->resample);
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ff_audio_mix_free(&avr->am);
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av_freep(&avr->mix_matrix);
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avr->use_channel_map = 0;
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}
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void avresample_free(AVAudioResampleContext **avr)
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{
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if (!*avr)
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return;
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avresample_close(*avr);
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av_opt_free(*avr);
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av_freep(avr);
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}
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static int handle_buffered_output(AVAudioResampleContext *avr,
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AudioData *output, AudioData *converted)
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{
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int ret;
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if (!output || av_audio_fifo_size(avr->out_fifo) > 0 ||
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(converted && output->allocated_samples < converted->nb_samples)) {
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if (converted) {
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/* if there are any samples in the output FIFO or if the
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user-supplied output buffer is not large enough for all samples,
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we add to the output FIFO */
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av_dlog(avr, "[FIFO] add %s to out_fifo\n", converted->name);
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ret = ff_audio_data_add_to_fifo(avr->out_fifo, converted, 0,
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converted->nb_samples);
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if (ret < 0)
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return ret;
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}
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/* if the user specified an output buffer, read samples from the output
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FIFO to the user output */
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if (output && output->allocated_samples > 0) {
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av_dlog(avr, "[FIFO] read from out_fifo to output\n");
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av_dlog(avr, "[end conversion]\n");
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return ff_audio_data_read_from_fifo(avr->out_fifo, output,
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output->allocated_samples);
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}
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} else if (converted) {
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/* copy directly to output if it is large enough or there is not any
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data in the output FIFO */
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av_dlog(avr, "[copy] %s to output\n", converted->name);
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output->nb_samples = 0;
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ret = ff_audio_data_copy(output, converted,
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avr->remap_point == REMAP_OUT_COPY ?
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&avr->ch_map_info : NULL);
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if (ret < 0)
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return ret;
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av_dlog(avr, "[end conversion]\n");
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return output->nb_samples;
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}
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av_dlog(avr, "[end conversion]\n");
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return 0;
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}
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int attribute_align_arg avresample_convert(AVAudioResampleContext *avr,
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uint8_t **output, int out_plane_size,
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int out_samples, uint8_t **input,
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int in_plane_size, int in_samples)
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{
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AudioData input_buffer;
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AudioData output_buffer;
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AudioData *current_buffer;
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int ret, direct_output;
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/* reset internal buffers */
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if (avr->in_buffer) {
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avr->in_buffer->nb_samples = 0;
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ff_audio_data_set_channels(avr->in_buffer,
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avr->in_buffer->allocated_channels);
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}
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if (avr->resample_out_buffer) {
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avr->resample_out_buffer->nb_samples = 0;
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ff_audio_data_set_channels(avr->resample_out_buffer,
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avr->resample_out_buffer->allocated_channels);
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}
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if (avr->out_buffer) {
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avr->out_buffer->nb_samples = 0;
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ff_audio_data_set_channels(avr->out_buffer,
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avr->out_buffer->allocated_channels);
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}
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av_dlog(avr, "[start conversion]\n");
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/* initialize output_buffer with output data */
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direct_output = output && av_audio_fifo_size(avr->out_fifo) == 0;
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if (output) {
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ret = ff_audio_data_init(&output_buffer, output, out_plane_size,
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avr->out_channels, out_samples,
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avr->out_sample_fmt, 0, "output");
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if (ret < 0)
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return ret;
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output_buffer.nb_samples = 0;
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}
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if (input) {
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/* initialize input_buffer with input data */
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ret = ff_audio_data_init(&input_buffer, input, in_plane_size,
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avr->in_channels, in_samples,
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avr->in_sample_fmt, 1, "input");
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if (ret < 0)
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return ret;
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current_buffer = &input_buffer;
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if (avr->upmix_needed && !avr->in_convert_needed && !avr->resample_needed &&
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!avr->out_convert_needed && direct_output && out_samples >= in_samples) {
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/* in some rare cases we can copy input to output and upmix
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directly in the output buffer */
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av_dlog(avr, "[copy] %s to output\n", current_buffer->name);
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ret = ff_audio_data_copy(&output_buffer, current_buffer,
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avr->remap_point == REMAP_OUT_COPY ?
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&avr->ch_map_info : NULL);
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if (ret < 0)
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return ret;
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current_buffer = &output_buffer;
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} else if (avr->remap_point == REMAP_OUT_COPY &&
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(!direct_output || out_samples < in_samples)) {
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/* if remapping channels during output copy, we may need to
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* use an intermediate buffer in order to remap before adding
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* samples to the output fifo */
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av_dlog(avr, "[copy] %s to out_buffer\n", current_buffer->name);
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ret = ff_audio_data_copy(avr->out_buffer, current_buffer,
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&avr->ch_map_info);
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if (ret < 0)
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return ret;
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current_buffer = avr->out_buffer;
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} else if (avr->in_copy_needed || avr->in_convert_needed) {
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/* if needed, copy or convert input to in_buffer, and downmix if
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applicable */
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if (avr->in_convert_needed) {
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ret = ff_audio_data_realloc(avr->in_buffer,
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current_buffer->nb_samples);
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if (ret < 0)
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return ret;
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av_dlog(avr, "[convert] %s to in_buffer\n", current_buffer->name);
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ret = ff_audio_convert(avr->ac_in, avr->in_buffer,
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current_buffer);
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if (ret < 0)
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return ret;
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} else {
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av_dlog(avr, "[copy] %s to in_buffer\n", current_buffer->name);
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ret = ff_audio_data_copy(avr->in_buffer, current_buffer,
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avr->remap_point == REMAP_IN_COPY ?
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&avr->ch_map_info : NULL);
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if (ret < 0)
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return ret;
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}
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ff_audio_data_set_channels(avr->in_buffer, avr->in_channels);
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if (avr->downmix_needed) {
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av_dlog(avr, "[downmix] in_buffer\n");
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ret = ff_audio_mix(avr->am, avr->in_buffer);
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if (ret < 0)
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return ret;
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}
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current_buffer = avr->in_buffer;
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}
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} else {
|
|
/* flush resampling buffer and/or output FIFO if input is NULL */
|
|
if (!avr->resample_needed)
|
|
return handle_buffered_output(avr, output ? &output_buffer : NULL,
|
|
NULL);
|
|
current_buffer = NULL;
|
|
}
|
|
|
|
if (avr->resample_needed) {
|
|
AudioData *resample_out;
|
|
|
|
if (!avr->out_convert_needed && direct_output && out_samples > 0)
|
|
resample_out = &output_buffer;
|
|
else
|
|
resample_out = avr->resample_out_buffer;
|
|
av_dlog(avr, "[resample] %s to %s\n",
|
|
current_buffer ? current_buffer->name : "null",
|
|
resample_out->name);
|
|
ret = ff_audio_resample(avr->resample, resample_out,
|
|
current_buffer);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* if resampling did not produce any samples, just return 0 */
|
|
if (resample_out->nb_samples == 0) {
|
|
av_dlog(avr, "[end conversion]\n");
|
|
return 0;
|
|
}
|
|
|
|
current_buffer = resample_out;
|
|
}
|
|
|
|
if (avr->upmix_needed) {
|
|
av_dlog(avr, "[upmix] %s\n", current_buffer->name);
|
|
ret = ff_audio_mix(avr->am, current_buffer);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
/* if we resampled or upmixed directly to output, return here */
|
|
if (current_buffer == &output_buffer) {
|
|
av_dlog(avr, "[end conversion]\n");
|
|
return current_buffer->nb_samples;
|
|
}
|
|
|
|
if (avr->out_convert_needed) {
|
|
if (direct_output && out_samples >= current_buffer->nb_samples) {
|
|
/* convert directly to output */
|
|
av_dlog(avr, "[convert] %s to output\n", current_buffer->name);
|
|
ret = ff_audio_convert(avr->ac_out, &output_buffer, current_buffer);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
av_dlog(avr, "[end conversion]\n");
|
|
return output_buffer.nb_samples;
|
|
} else {
|
|
ret = ff_audio_data_realloc(avr->out_buffer,
|
|
current_buffer->nb_samples);
|
|
if (ret < 0)
|
|
return ret;
|
|
av_dlog(avr, "[convert] %s to out_buffer\n", current_buffer->name);
|
|
ret = ff_audio_convert(avr->ac_out, avr->out_buffer,
|
|
current_buffer);
|
|
if (ret < 0)
|
|
return ret;
|
|
current_buffer = avr->out_buffer;
|
|
}
|
|
}
|
|
|
|
return handle_buffered_output(avr, output ? &output_buffer : NULL,
|
|
current_buffer);
|
|
}
|
|
|
|
int avresample_config(AVAudioResampleContext *avr, AVFrame *out, AVFrame *in)
|
|
{
|
|
if (avresample_is_open(avr)) {
|
|
avresample_close(avr);
|
|
}
|
|
|
|
if (in) {
|
|
avr->in_channel_layout = in->channel_layout;
|
|
avr->in_sample_rate = in->sample_rate;
|
|
avr->in_sample_fmt = in->format;
|
|
}
|
|
|
|
if (out) {
|
|
avr->out_channel_layout = out->channel_layout;
|
|
avr->out_sample_rate = out->sample_rate;
|
|
avr->out_sample_fmt = out->format;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int config_changed(AVAudioResampleContext *avr,
|
|
AVFrame *out, AVFrame *in)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (in) {
|
|
if (avr->in_channel_layout != in->channel_layout ||
|
|
avr->in_sample_rate != in->sample_rate ||
|
|
avr->in_sample_fmt != in->format) {
|
|
ret |= AVERROR_INPUT_CHANGED;
|
|
}
|
|
}
|
|
|
|
if (out) {
|
|
if (avr->out_channel_layout != out->channel_layout ||
|
|
avr->out_sample_rate != out->sample_rate ||
|
|
avr->out_sample_fmt != out->format) {
|
|
ret |= AVERROR_OUTPUT_CHANGED;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline int convert_frame(AVAudioResampleContext *avr,
|
|
AVFrame *out, AVFrame *in)
|
|
{
|
|
int ret;
|
|
uint8_t **out_data = NULL, **in_data = NULL;
|
|
int out_linesize = 0, in_linesize = 0;
|
|
int out_nb_samples = 0, in_nb_samples = 0;
|
|
|
|
if (out) {
|
|
out_data = out->extended_data;
|
|
out_linesize = out->linesize[0];
|
|
out_nb_samples = out->nb_samples;
|
|
}
|
|
|
|
if (in) {
|
|
in_data = in->extended_data;
|
|
in_linesize = in->linesize[0];
|
|
in_nb_samples = in->nb_samples;
|
|
}
|
|
|
|
ret = avresample_convert(avr, out_data, out_linesize,
|
|
out_nb_samples,
|
|
in_data, in_linesize,
|
|
in_nb_samples);
|
|
|
|
if (ret < 0) {
|
|
if (out)
|
|
out->nb_samples = 0;
|
|
return ret;
|
|
}
|
|
|
|
if (out)
|
|
out->nb_samples = ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int available_samples(AVFrame *out)
|
|
{
|
|
int samples;
|
|
int bytes_per_sample = av_get_bytes_per_sample(out->format);
|
|
if (!bytes_per_sample)
|
|
return AVERROR(EINVAL);
|
|
|
|
samples = out->linesize[0] / bytes_per_sample;
|
|
if (av_sample_fmt_is_planar(out->format)) {
|
|
return samples;
|
|
} else {
|
|
int channels = av_get_channel_layout_nb_channels(out->channel_layout);
|
|
return samples / channels;
|
|
}
|
|
}
|
|
|
|
int avresample_convert_frame(AVAudioResampleContext *avr,
|
|
AVFrame *out, AVFrame *in)
|
|
{
|
|
int ret, setup = 0;
|
|
|
|
if (!avresample_is_open(avr)) {
|
|
if ((ret = avresample_config(avr, out, in)) < 0)
|
|
return ret;
|
|
if ((ret = avresample_open(avr)) < 0)
|
|
return ret;
|
|
setup = 1;
|
|
} else {
|
|
// return as is or reconfigure for input changes?
|
|
if ((ret = config_changed(avr, out, in)))
|
|
return ret;
|
|
}
|
|
|
|
if (out) {
|
|
if (!out->linesize[0]) {
|
|
out->nb_samples = avresample_get_out_samples(avr, in->nb_samples);
|
|
if ((ret = av_frame_get_buffer(out, 0)) < 0) {
|
|
if (setup)
|
|
avresample_close(avr);
|
|
return ret;
|
|
}
|
|
} else {
|
|
if (!out->nb_samples)
|
|
out->nb_samples = available_samples(out);
|
|
}
|
|
}
|
|
|
|
return convert_frame(avr, out, in);
|
|
}
|
|
|
|
int avresample_get_matrix(AVAudioResampleContext *avr, double *matrix,
|
|
int stride)
|
|
{
|
|
int in_channels, out_channels, i, o;
|
|
|
|
if (avr->am)
|
|
return ff_audio_mix_get_matrix(avr->am, matrix, stride);
|
|
|
|
in_channels = av_get_channel_layout_nb_channels(avr->in_channel_layout);
|
|
out_channels = av_get_channel_layout_nb_channels(avr->out_channel_layout);
|
|
|
|
if ( in_channels <= 0 || in_channels > AVRESAMPLE_MAX_CHANNELS ||
|
|
out_channels <= 0 || out_channels > AVRESAMPLE_MAX_CHANNELS) {
|
|
av_log(avr, AV_LOG_ERROR, "Invalid channel layouts\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (!avr->mix_matrix) {
|
|
av_log(avr, AV_LOG_ERROR, "matrix is not set\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
for (o = 0; o < out_channels; o++)
|
|
for (i = 0; i < in_channels; i++)
|
|
matrix[o * stride + i] = avr->mix_matrix[o * in_channels + i];
|
|
|
|
return 0;
|
|
}
|
|
|
|
int avresample_set_matrix(AVAudioResampleContext *avr, const double *matrix,
|
|
int stride)
|
|
{
|
|
int in_channels, out_channels, i, o;
|
|
|
|
if (avr->am)
|
|
return ff_audio_mix_set_matrix(avr->am, matrix, stride);
|
|
|
|
in_channels = av_get_channel_layout_nb_channels(avr->in_channel_layout);
|
|
out_channels = av_get_channel_layout_nb_channels(avr->out_channel_layout);
|
|
|
|
if ( in_channels <= 0 || in_channels > AVRESAMPLE_MAX_CHANNELS ||
|
|
out_channels <= 0 || out_channels > AVRESAMPLE_MAX_CHANNELS) {
|
|
av_log(avr, AV_LOG_ERROR, "Invalid channel layouts\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (avr->mix_matrix)
|
|
av_freep(&avr->mix_matrix);
|
|
avr->mix_matrix = av_malloc(in_channels * out_channels *
|
|
sizeof(*avr->mix_matrix));
|
|
if (!avr->mix_matrix)
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (o = 0; o < out_channels; o++)
|
|
for (i = 0; i < in_channels; i++)
|
|
avr->mix_matrix[o * in_channels + i] = matrix[o * stride + i];
|
|
|
|
return 0;
|
|
}
|
|
|
|
int avresample_set_channel_mapping(AVAudioResampleContext *avr,
|
|
const int *channel_map)
|
|
{
|
|
ChannelMapInfo *info = &avr->ch_map_info;
|
|
int in_channels, ch, i;
|
|
|
|
in_channels = av_get_channel_layout_nb_channels(avr->in_channel_layout);
|
|
if (in_channels <= 0 || in_channels > AVRESAMPLE_MAX_CHANNELS) {
|
|
av_log(avr, AV_LOG_ERROR, "Invalid input channel layout\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
memset(info, 0, sizeof(*info));
|
|
memset(info->input_map, -1, sizeof(info->input_map));
|
|
|
|
for (ch = 0; ch < in_channels; ch++) {
|
|
if (channel_map[ch] >= in_channels) {
|
|
av_log(avr, AV_LOG_ERROR, "Invalid channel map\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
if (channel_map[ch] < 0) {
|
|
info->channel_zero[ch] = 1;
|
|
info->channel_map[ch] = -1;
|
|
info->do_zero = 1;
|
|
} else if (info->input_map[channel_map[ch]] >= 0) {
|
|
info->channel_copy[ch] = info->input_map[channel_map[ch]];
|
|
info->channel_map[ch] = -1;
|
|
info->do_copy = 1;
|
|
} else {
|
|
info->channel_map[ch] = channel_map[ch];
|
|
info->input_map[channel_map[ch]] = ch;
|
|
info->do_remap = 1;
|
|
}
|
|
}
|
|
/* Fill-in unmapped input channels with unmapped output channels.
|
|
This is used when remapping during conversion from interleaved to
|
|
planar format. */
|
|
for (ch = 0, i = 0; ch < in_channels && i < in_channels; ch++, i++) {
|
|
while (ch < in_channels && info->input_map[ch] >= 0)
|
|
ch++;
|
|
while (i < in_channels && info->channel_map[i] >= 0)
|
|
i++;
|
|
if (ch >= in_channels || i >= in_channels)
|
|
break;
|
|
info->input_map[ch] = i;
|
|
}
|
|
|
|
avr->use_channel_map = 1;
|
|
return 0;
|
|
}
|
|
|
|
int avresample_available(AVAudioResampleContext *avr)
|
|
{
|
|
return av_audio_fifo_size(avr->out_fifo);
|
|
}
|
|
|
|
int avresample_get_out_samples(AVAudioResampleContext *avr, int in_nb_samples)
|
|
{
|
|
int64_t samples = avresample_get_delay(avr) + (int64_t)in_nb_samples;
|
|
|
|
if (avr->resample_needed) {
|
|
samples = av_rescale_rnd(samples,
|
|
avr->out_sample_rate,
|
|
avr->in_sample_rate,
|
|
AV_ROUND_UP);
|
|
}
|
|
|
|
samples += avresample_available(avr);
|
|
|
|
if (samples > INT_MAX)
|
|
return AVERROR(EINVAL);
|
|
|
|
return samples;
|
|
}
|
|
|
|
int avresample_read(AVAudioResampleContext *avr, uint8_t **output, int nb_samples)
|
|
{
|
|
if (!output)
|
|
return av_audio_fifo_drain(avr->out_fifo, nb_samples);
|
|
return av_audio_fifo_read(avr->out_fifo, (void**)output, nb_samples);
|
|
}
|
|
|
|
unsigned avresample_version(void)
|
|
{
|
|
return LIBAVRESAMPLE_VERSION_INT;
|
|
}
|
|
|
|
const char *avresample_license(void)
|
|
{
|
|
#define LICENSE_PREFIX "libavresample license: "
|
|
return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
|
|
}
|
|
|
|
const char *avresample_configuration(void)
|
|
{
|
|
return FFMPEG_CONFIGURATION;
|
|
}
|