diff options
Diffstat (limited to 'libavresample/utils.c')
| -rw-r--r-- | libavresample/utils.c | 793 |
1 files changed, 0 insertions, 793 deletions
diff --git a/libavresample/utils.c b/libavresample/utils.c deleted file mode 100644 index b4fb906556..0000000000 --- a/libavresample/utils.c +++ /dev/null @@ -1,793 +0,0 @@ -/* - * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com> - * - * This file is part of FFmpeg. - * - * 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. - * - * 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 FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libavutil/common.h" -#include "libavutil/dict.h" -// #include "libavutil/error.h" -#include "libavutil/frame.h" -#include "libavutil/log.h" -#include "libavutil/mem.h" -#include "libavutil/opt.h" - -#include "avresample.h" -#include "internal.h" -#include "audio_data.h" -#include "audio_convert.h" -#include "audio_mix.h" -#include "resample.h" - -int avresample_open(AVAudioResampleContext *avr) -{ - int ret; - - if (avresample_is_open(avr)) { - av_log(avr, AV_LOG_ERROR, "The resampling context is already open.\n"); - return AVERROR(EINVAL); - } - - /* set channel mixing parameters */ - avr->in_channels = av_get_channel_layout_nb_channels(avr->in_channel_layout); - if (avr->in_channels <= 0 || avr->in_channels > AVRESAMPLE_MAX_CHANNELS) { - av_log(avr, AV_LOG_ERROR, "Invalid input channel layout: %"PRIu64"\n", - avr->in_channel_layout); - return AVERROR(EINVAL); - } - avr->out_channels = av_get_channel_layout_nb_channels(avr->out_channel_layout); - if (avr->out_channels <= 0 || avr->out_channels > AVRESAMPLE_MAX_CHANNELS) { - av_log(avr, AV_LOG_ERROR, "Invalid output channel layout: %"PRIu64"\n", - avr->out_channel_layout); - return AVERROR(EINVAL); - } - avr->resample_channels = FFMIN(avr->in_channels, avr->out_channels); - avr->downmix_needed = avr->in_channels > avr->out_channels; - avr->upmix_needed = avr->out_channels > avr->in_channels || - (!avr->downmix_needed && (avr->mix_matrix || - avr->in_channel_layout != avr->out_channel_layout)); - avr->mixing_needed = avr->downmix_needed || avr->upmix_needed; - - /* set resampling parameters */ - avr->resample_needed = avr->in_sample_rate != avr->out_sample_rate || - avr->force_resampling; - - /* select internal sample format if not specified by the user */ - if (avr->internal_sample_fmt == AV_SAMPLE_FMT_NONE && - (avr->mixing_needed || avr->resample_needed)) { - enum AVSampleFormat in_fmt = av_get_planar_sample_fmt(avr->in_sample_fmt); - enum AVSampleFormat out_fmt = av_get_planar_sample_fmt(avr->out_sample_fmt); - int max_bps = FFMAX(av_get_bytes_per_sample(in_fmt), - av_get_bytes_per_sample(out_fmt)); - if (max_bps <= 2) { - avr->internal_sample_fmt = AV_SAMPLE_FMT_S16P; - } else if (avr->mixing_needed) { - avr->internal_sample_fmt = AV_SAMPLE_FMT_FLTP; - } else { - if (max_bps <= 4) { - if (in_fmt == AV_SAMPLE_FMT_S32P || - out_fmt == AV_SAMPLE_FMT_S32P) { - if (in_fmt == AV_SAMPLE_FMT_FLTP || - out_fmt == AV_SAMPLE_FMT_FLTP) { - /* if one is s32 and the other is flt, use dbl */ - avr->internal_sample_fmt = AV_SAMPLE_FMT_DBLP; - } else { - /* if one is s32 and the other is s32, s16, or u8, use s32 */ - avr->internal_sample_fmt = AV_SAMPLE_FMT_S32P; - } - } else { - /* if one is flt and the other is flt, s16 or u8, use flt */ - avr->internal_sample_fmt = AV_SAMPLE_FMT_FLTP; - } - } else { - /* if either is dbl, use dbl */ - avr->internal_sample_fmt = AV_SAMPLE_FMT_DBLP; - } - } - av_log(avr, AV_LOG_DEBUG, "Using %s as internal sample format\n", - av_get_sample_fmt_name(avr->internal_sample_fmt)); - } - - /* we may need to add an extra conversion in order to remap channels if - the output format is not planar */ - if (avr->use_channel_map && !avr->mixing_needed && !avr->resample_needed && - !ff_sample_fmt_is_planar(avr->out_sample_fmt, avr->out_channels)) { - avr->internal_sample_fmt = av_get_planar_sample_fmt(avr->out_sample_fmt); - } - - /* set sample format conversion parameters */ - if (avr->resample_needed || avr->mixing_needed) - avr->in_convert_needed = avr->in_sample_fmt != avr->internal_sample_fmt; - else - avr->in_convert_needed = avr->use_channel_map && - !ff_sample_fmt_is_planar(avr->out_sample_fmt, avr->out_channels); - - if (avr->resample_needed || avr->mixing_needed || avr->in_convert_needed) - avr->out_convert_needed = avr->internal_sample_fmt != avr->out_sample_fmt; - else - avr->out_convert_needed = avr->in_sample_fmt != avr->out_sample_fmt; - - avr->in_copy_needed = !avr->in_convert_needed && (avr->mixing_needed || - (avr->use_channel_map && avr->resample_needed)); - - if (avr->use_channel_map) { - if (avr->in_copy_needed) { - avr->remap_point = REMAP_IN_COPY; - av_log(avr, AV_LOG_TRACE, "remap channels during in_copy\n"); - } else if (avr->in_convert_needed) { - avr->remap_point = REMAP_IN_CONVERT; - av_log(avr, AV_LOG_TRACE, "remap channels during in_convert\n"); - } else if (avr->out_convert_needed) { - avr->remap_point = REMAP_OUT_CONVERT; - av_log(avr, AV_LOG_TRACE, "remap channels during out_convert\n"); - } else { - avr->remap_point = REMAP_OUT_COPY; - av_log(avr, AV_LOG_TRACE, "remap channels during out_copy\n"); - } - -#ifdef DEBUG - { - int ch; - av_log(avr, AV_LOG_TRACE, "output map: "); - if (avr->ch_map_info.do_remap) - for (ch = 0; ch < avr->in_channels; ch++) - av_log(avr, AV_LOG_TRACE, " % 2d", avr->ch_map_info.channel_map[ch]); - else - av_log(avr, AV_LOG_TRACE, "n/a"); - av_log(avr, AV_LOG_TRACE, "\n"); - av_log(avr, AV_LOG_TRACE, "copy map: "); - if (avr->ch_map_info.do_copy) - for (ch = 0; ch < avr->in_channels; ch++) - av_log(avr, AV_LOG_TRACE, " % 2d", avr->ch_map_info.channel_copy[ch]); - else - av_log(avr, AV_LOG_TRACE, "n/a"); - av_log(avr, AV_LOG_TRACE, "\n"); - av_log(avr, AV_LOG_TRACE, "zero map: "); - if (avr->ch_map_info.do_zero) - for (ch = 0; ch < avr->in_channels; ch++) - av_log(avr, AV_LOG_TRACE, " % 2d", avr->ch_map_info.channel_zero[ch]); - else - av_log(avr, AV_LOG_TRACE, "n/a"); - av_log(avr, AV_LOG_TRACE, "\n"); - av_log(avr, AV_LOG_TRACE, "input map: "); - for (ch = 0; ch < avr->in_channels; ch++) - av_log(avr, AV_LOG_TRACE, " % 2d", avr->ch_map_info.input_map[ch]); - av_log(avr, AV_LOG_TRACE, "\n"); - } -#endif - } else - avr->remap_point = REMAP_NONE; - - /* allocate buffers */ - if (avr->in_copy_needed || avr->in_convert_needed) { - avr->in_buffer = ff_audio_data_alloc(FFMAX(avr->in_channels, avr->out_channels), - 0, avr->internal_sample_fmt, - "in_buffer"); - if (!avr->in_buffer) { - ret = AVERROR(EINVAL); - goto error; - } - } - if (avr->resample_needed) { - avr->resample_out_buffer = ff_audio_data_alloc(avr->out_channels, - 1024, avr->internal_sample_fmt, - "resample_out_buffer"); - if (!avr->resample_out_buffer) { - ret = AVERROR(EINVAL); - goto error; - } - } - if (avr->out_convert_needed) { - avr->out_buffer = ff_audio_data_alloc(avr->out_channels, 0, - avr->out_sample_fmt, "out_buffer"); - if (!avr->out_buffer) { - ret = AVERROR(EINVAL); - goto error; - } - } - avr->out_fifo = av_audio_fifo_alloc(avr->out_sample_fmt, avr->out_channels, - 1024); - if (!avr->out_fifo) { - ret = AVERROR(ENOMEM); - goto error; - } - - /* setup contexts */ - if (avr->in_convert_needed) { - avr->ac_in = ff_audio_convert_alloc(avr, avr->internal_sample_fmt, - avr->in_sample_fmt, avr->in_channels, - avr->in_sample_rate, - avr->remap_point == REMAP_IN_CONVERT); - if (!avr->ac_in) { - ret = AVERROR(ENOMEM); - goto error; - } - } - if (avr->out_convert_needed) { - enum AVSampleFormat src_fmt; - if (avr->in_convert_needed) - src_fmt = avr->internal_sample_fmt; - else - src_fmt = avr->in_sample_fmt; - avr->ac_out = ff_audio_convert_alloc(avr, avr->out_sample_fmt, src_fmt, - avr->out_channels, - avr->out_sample_rate, - avr->remap_point == REMAP_OUT_CONVERT); - if (!avr->ac_out) { - ret = AVERROR(ENOMEM); - goto error; - } - } - if (avr->resample_needed) { - avr->resample = ff_audio_resample_init(avr); - if (!avr->resample) { - ret = AVERROR(ENOMEM); - goto error; - } - } - if (avr->mixing_needed) { - avr->am = ff_audio_mix_alloc(avr); - if (!avr->am) { - ret = AVERROR(ENOMEM); - goto error; - } - } - - return 0; - -error: - avresample_close(avr); - return ret; -} - -int avresample_is_open(AVAudioResampleContext *avr) -{ - return !!avr->out_fifo; -} - -void avresample_close(AVAudioResampleContext *avr) -{ - ff_audio_data_free(&avr->in_buffer); - ff_audio_data_free(&avr->resample_out_buffer); - ff_audio_data_free(&avr->out_buffer); - av_audio_fifo_free(avr->out_fifo); - avr->out_fifo = NULL; - ff_audio_convert_free(&avr->ac_in); - ff_audio_convert_free(&avr->ac_out); - ff_audio_resample_free(&avr->resample); - ff_audio_mix_free(&avr->am); - av_freep(&avr->mix_matrix); - - avr->use_channel_map = 0; -} - -void avresample_free(AVAudioResampleContext **avr) -{ - if (!*avr) - return; - avresample_close(*avr); - av_opt_free(*avr); - av_freep(avr); -} - -static int handle_buffered_output(AVAudioResampleContext *avr, - AudioData *output, AudioData *converted) -{ - int ret; - - if (!output || av_audio_fifo_size(avr->out_fifo) > 0 || - (converted && output->allocated_samples < converted->nb_samples)) { - if (converted) { - /* if there are any samples in the output FIFO or if the - user-supplied output buffer is not large enough for all samples, - we add to the output FIFO */ - av_log(avr, AV_LOG_TRACE, "[FIFO] add %s to out_fifo\n", converted->name); - ret = ff_audio_data_add_to_fifo(avr->out_fifo, converted, 0, - converted->nb_samples); - if (ret < 0) - return ret; - } - - /* if the user specified an output buffer, read samples from the output - FIFO to the user output */ - if (output && output->allocated_samples > 0) { - av_log(avr, AV_LOG_TRACE, "[FIFO] read from out_fifo to output\n"); - av_log(avr, AV_LOG_TRACE, "[end conversion]\n"); - return ff_audio_data_read_from_fifo(avr->out_fifo, output, - output->allocated_samples); - } - } else if (converted) { - /* copy directly to output if it is large enough or there is not any - data in the output FIFO */ - av_log(avr, AV_LOG_TRACE, "[copy] %s to output\n", converted->name); - output->nb_samples = 0; - ret = ff_audio_data_copy(output, converted, - avr->remap_point == REMAP_OUT_COPY ? - &avr->ch_map_info : NULL); - if (ret < 0) - return ret; - av_log(avr, AV_LOG_TRACE, "[end conversion]\n"); - return output->nb_samples; - } - av_log(avr, AV_LOG_TRACE, "[end conversion]\n"); - return 0; -} - -int attribute_align_arg avresample_convert(AVAudioResampleContext *avr, - uint8_t **output, int out_plane_size, - int out_samples, - uint8_t * const *input, - int in_plane_size, int in_samples) -{ - AudioData input_buffer; - AudioData output_buffer; - AudioData *current_buffer; - int ret, direct_output; - - /* reset internal buffers */ - if (avr->in_buffer) { - avr->in_buffer->nb_samples = 0; - ff_audio_data_set_channels(avr->in_buffer, - avr->in_buffer->allocated_channels); - } - if (avr->resample_out_buffer) { - avr->resample_out_buffer->nb_samples = 0; - ff_audio_data_set_channels(avr->resample_out_buffer, - avr->resample_out_buffer->allocated_channels); - } - if (avr->out_buffer) { - avr->out_buffer->nb_samples = 0; - ff_audio_data_set_channels(avr->out_buffer, - avr->out_buffer->allocated_channels); - } - - av_log(avr, AV_LOG_TRACE, "[start conversion]\n"); - - /* initialize output_buffer with output data */ - direct_output = output && av_audio_fifo_size(avr->out_fifo) == 0; - if (output) { - ret = ff_audio_data_init(&output_buffer, output, out_plane_size, - avr->out_channels, out_samples, - avr->out_sample_fmt, 0, "output"); - if (ret < 0) - return ret; - output_buffer.nb_samples = 0; - } - - if (input) { - /* initialize input_buffer with input data */ - ret = ff_audio_data_init(&input_buffer, input, in_plane_size, - avr->in_channels, in_samples, - avr->in_sample_fmt, 1, "input"); - if (ret < 0) - return ret; - current_buffer = &input_buffer; - - if (avr->upmix_needed && !avr->in_convert_needed && !avr->resample_needed && - !avr->out_convert_needed && direct_output && out_samples >= in_samples) { - /* in some rare cases we can copy input to output and upmix - directly in the output buffer */ - av_log(avr, AV_LOG_TRACE, "[copy] %s to output\n", current_buffer->name); - ret = ff_audio_data_copy(&output_buffer, current_buffer, - avr->remap_point == REMAP_OUT_COPY ? - &avr->ch_map_info : NULL); - if (ret < 0) - return ret; - current_buffer = &output_buffer; - } else if (avr->remap_point == REMAP_OUT_COPY && - (!direct_output || out_samples < in_samples)) { - /* if remapping channels during output copy, we may need to - * use an intermediate buffer in order to remap before adding - * samples to the output fifo */ - av_log(avr, AV_LOG_TRACE, "[copy] %s to out_buffer\n", current_buffer->name); - ret = ff_audio_data_copy(avr->out_buffer, current_buffer, - &avr->ch_map_info); - if (ret < 0) - return ret; - current_buffer = avr->out_buffer; - } else if (avr->in_copy_needed || avr->in_convert_needed) { - /* if needed, copy or convert input to in_buffer, and downmix if - applicable */ - if (avr->in_convert_needed) { - ret = ff_audio_data_realloc(avr->in_buffer, - current_buffer->nb_samples); - if (ret < 0) - return ret; - av_log(avr, AV_LOG_TRACE, "[convert] %s to in_buffer\n", current_buffer->name); - ret = ff_audio_convert(avr->ac_in, avr->in_buffer, - current_buffer); - if (ret < 0) - return ret; - } else { - av_log(avr, AV_LOG_TRACE, "[copy] %s to in_buffer\n", current_buffer->name); - ret = ff_audio_data_copy(avr->in_buffer, current_buffer, - avr->remap_point == REMAP_IN_COPY ? - &avr->ch_map_info : NULL); - if (ret < 0) - return ret; - } - ff_audio_data_set_channels(avr->in_buffer, avr->in_channels); - if (avr->downmix_needed) { - av_log(avr, AV_LOG_TRACE, "[downmix] in_buffer\n"); - ret = ff_audio_mix(avr->am, avr->in_buffer); - if (ret < 0) - return ret; - } - current_buffer = avr->in_buffer; - } - } 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_log(avr, AV_LOG_TRACE, "[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_log(avr, AV_LOG_TRACE, "[end conversion]\n"); - return 0; - } - - current_buffer = resample_out; - } - - if (avr->upmix_needed) { - av_log(avr, AV_LOG_TRACE, "[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_log(avr, AV_LOG_TRACE, "[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_log(avr, AV_LOG_TRACE, "[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_log(avr, AV_LOG_TRACE, "[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_log(avr, AV_LOG_TRACE, "[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; -} |