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111 lines
3.1 KiB
C++
111 lines
3.1 KiB
C++
// This file is a wrapper around the libavresample library (the API-incompatible swresample replacement in the libav fork of ffmpeg), to make it look like swresample to the user.
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#ifndef HAVE_LIBSWRESAMPLE
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extern "C"
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{
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#include <stdint.h>
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#include <libavcodec/avcodec.h>
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#include <libavformat/avformat.h>
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// From libavutil version 52.2.0 and onward the declaration of
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// AV_CH_LAYOUT_* is removed from libavcodec/avcodec.h and moved to
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// libavutil/channel_layout.h
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#if AV_VERSION_INT(52, 2, 0) <= AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
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LIBAVUTIL_VERSION_MINOR, LIBAVUTIL_VERSION_MICRO)
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#include <libavutil/channel_layout.h>
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#endif
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#include <libavresample/avresample.h>
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#include <libavutil/opt.h>
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/* FIXME: delete this file once libswresample is packaged for Debian */
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int swr_init(AVAudioResampleContext *avr) { return 1; }
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void swr_free(AVAudioResampleContext **avr) { avresample_free(avr); }
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int swr_convert(
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AVAudioResampleContext *avr,
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uint8_t** output,
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int out_samples,
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const uint8_t** input,
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int in_samples)
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{
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// FIXME: potential performance hit
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int out_plane_size = 0;
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int in_plane_size = 0;
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return avresample_convert(avr, output, out_plane_size, out_samples,
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(uint8_t **)input, in_plane_size, in_samples);
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}
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AVAudioResampleContext * swr_alloc_set_opts(
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AVAudioResampleContext *avr,
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int64_t out_ch_layout,
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AVSampleFormat out_fmt,
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int out_rate,
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int64_t in_ch_layout,
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AVSampleFormat in_fmt,
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int in_rate,
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int o,
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void* l)
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{
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avr = avresample_alloc_context();
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if(!avr)
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return 0;
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int res;
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res = av_opt_set_int(avr, "out_channel_layout", out_ch_layout, 0);
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if(res < 0)
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{
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av_log(avr, AV_LOG_ERROR, "av_opt_set_int: out_ch_layout = %d\n", res);
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return 0;
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}
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res = av_opt_set_int(avr, "out_sample_fmt", out_fmt, 0);
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if(res < 0)
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{
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av_log(avr, AV_LOG_ERROR, "av_opt_set_int: out_fmt = %d\n", res);
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return 0;
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}
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res = av_opt_set_int(avr, "out_sample_rate", out_rate, 0);
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if(res < 0)
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{
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av_log(avr, AV_LOG_ERROR, "av_opt_set_int: out_rate = %d\n", res);
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return 0;
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}
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res = av_opt_set_int(avr, "in_channel_layout", in_ch_layout, 0);
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if(res < 0)
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{
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av_log(avr, AV_LOG_ERROR, "av_opt_set_int: in_ch_layout = %d\n", res);
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return 0;
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}
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res = av_opt_set_int(avr, "in_sample_fmt", in_fmt, 0);
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if(res < 0)
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{
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av_log(avr, AV_LOG_ERROR, "av_opt_set_int: in_fmt = %d\n", res);
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return 0;
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}
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res = av_opt_set_int(avr, "in_sample_rate", in_rate, 0);
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if(res < 0)
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{
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av_log(avr, AV_LOG_ERROR, "av_opt_set_int: in_rate = %d\n", res);
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return 0;
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}
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res = av_opt_set_int(avr, "internal_sample_fmt", AV_SAMPLE_FMT_FLTP, 0);
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if(res < 0)
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{
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av_log(avr, AV_LOG_ERROR, "av_opt_set_int: internal_sample_fmt\n");
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return 0;
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}
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if(avresample_open(avr) < 0)
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{
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av_log(avr, AV_LOG_ERROR, "Error opening context\n");
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return 0;
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}
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else
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return avr;
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}
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}
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#endif
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