| /* |
| * 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; |
| } |
