/* * 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 <stdlib.h> #include <stdio.h> #include <inttypes.h> #include "libavutil/mem.h" #include "libavutil/audio_fifo.c" #define MAX_CHANNELS 32 typedef struct TestStruct { const enum AVSampleFormat format; const int nb_ch; void const *data_planes[MAX_CHANNELS]; const int nb_samples_pch; } TestStruct; static const uint8_t data_U8 [] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; static const int16_t data_S16[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; static const float data_FLT[] = {0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0}; static const TestStruct test_struct[] = { {.format = AV_SAMPLE_FMT_U8 , .nb_ch = 1, .data_planes = {data_U8 , }, .nb_samples_pch = 12}, {.format = AV_SAMPLE_FMT_U8P , .nb_ch = 2, .data_planes = {data_U8 , data_U8 +6, }, .nb_samples_pch = 6 }, {.format = AV_SAMPLE_FMT_S16 , .nb_ch = 1, .data_planes = {data_S16, }, .nb_samples_pch = 12}, {.format = AV_SAMPLE_FMT_S16P , .nb_ch = 2, .data_planes = {data_S16, data_S16+6, }, .nb_samples_pch = 6 }, {.format = AV_SAMPLE_FMT_FLT , .nb_ch = 1, .data_planes = {data_FLT, }, .nb_samples_pch = 12}, {.format = AV_SAMPLE_FMT_FLTP , .nb_ch = 2, .data_planes = {data_FLT, data_FLT+6, }, .nb_samples_pch = 6 } }; static void free_data_planes(AVAudioFifo *afifo, void **output_data) { int i; for (i = 0; i < afifo->nb_buffers; ++i){ av_freep(&output_data[i]); } av_freep(&output_data); } static void ERROR(const char *str) { fprintf(stderr, "%s\n", str); exit(1); } static void print_audio_bytes(const TestStruct *test_sample, void **data_planes, int nb_samples) { int p, b, f; int byte_offset = av_get_bytes_per_sample(test_sample->format); int buffers = av_sample_fmt_is_planar(test_sample->format) ? test_sample->nb_ch : 1; int line_size = (buffers > 1) ? nb_samples * byte_offset : nb_samples * byte_offset * test_sample->nb_ch; for (p = 0; p < buffers; ++p){ for(b = 0; b < line_size; b+=byte_offset){ for (f = 0; f < byte_offset; f++){ int order = !HAVE_BIGENDIAN ? (byte_offset - f - 1) : f; printf("%02x", *((uint8_t*)data_planes[p] + b + order)); } putchar(' '); } putchar('\n'); } } static int read_samples_from_audio_fifo(AVAudioFifo* afifo, void ***output, int nb_samples) { int i; int samples = FFMIN(nb_samples, afifo->nb_samples); int tot_elements = !av_sample_fmt_is_planar(afifo->sample_fmt) ? samples : afifo->channels * samples; void **data_planes = av_malloc_array(afifo->nb_buffers, sizeof(void*)); if (!data_planes) ERROR("failed to allocate memory!"); if (*output) free_data_planes(afifo, *output); *output = data_planes; for (i = 0; i < afifo->nb_buffers; ++i){ data_planes[i] = av_malloc_array(tot_elements, afifo->sample_size); if (!data_planes[i]) ERROR("failed to allocate memory!"); } return av_audio_fifo_read(afifo, *output, nb_samples); } static int write_samples_to_audio_fifo(AVAudioFifo* afifo, const TestStruct *test_sample, int nb_samples, int offset) { int offset_size, i; void *data_planes[MAX_CHANNELS]; if(nb_samples > test_sample->nb_samples_pch - offset){ return 0; } if(offset >= test_sample->nb_samples_pch){ return 0; } offset_size = offset * afifo->sample_size; for (i = 0; i < afifo->nb_buffers ; ++i){ data_planes[i] = (uint8_t*)test_sample->data_planes[i] + offset_size; } return av_audio_fifo_write(afifo, data_planes, nb_samples); } static void test_function(const TestStruct *test_sample) { int ret, i; void **output_data = NULL; AVAudioFifo *afifo = av_audio_fifo_alloc(test_sample->format, test_sample->nb_ch, test_sample->nb_samples_pch); if (!afifo) { ERROR("ERROR: av_audio_fifo_alloc returned NULL!"); } ret = write_samples_to_audio_fifo(afifo, test_sample, test_sample->nb_samples_pch, 0); if (ret < 0){ ERROR("ERROR: av_audio_fifo_write failed!"); } printf("written: %d\n", ret); ret = write_samples_to_audio_fifo(afifo, test_sample, test_sample->nb_samples_pch, 0); if (ret < 0){ ERROR("ERROR: av_audio_fifo_write failed!"); } printf("written: %d\n", ret); printf("remaining samples in audio_fifo: %d\n\n", av_audio_fifo_size(afifo)); ret = read_samples_from_audio_fifo(afifo, &output_data, test_sample->nb_samples_pch); if (ret < 0){ ERROR("ERROR: av_audio_fifo_read failed!"); } printf("read: %d\n", ret); print_audio_bytes(test_sample, output_data, ret); printf("remaining samples in audio_fifo: %d\n\n", av_audio_fifo_size(afifo)); /* test av_audio_fifo_peek */ ret = av_audio_fifo_peek(afifo, output_data, afifo->nb_samples); if (ret < 0){ ERROR("ERROR: av_audio_fifo_peek failed!"); } printf("peek:\n"); print_audio_bytes(test_sample, output_data, ret); printf("\n"); /* test av_audio_fifo_peek_at */ printf("peek_at:\n"); for (i = 0; i < afifo->nb_samples; ++i){ ret = av_audio_fifo_peek_at(afifo, output_data, 1, i); if (ret < 0){ ERROR("ERROR: av_audio_fifo_peek_at failed!"); } printf("%d:\n", i); print_audio_bytes(test_sample, output_data, ret); } printf("\n"); /* test av_audio_fifo_drain */ ret = av_audio_fifo_drain(afifo, afifo->nb_samples); if (ret < 0){ ERROR("ERROR: av_audio_fifo_drain failed!"); } if (afifo->nb_samples){ ERROR("drain failed to flush all samples in audio_fifo!"); } /* deallocate */ free_data_planes(afifo, output_data); av_audio_fifo_free(afifo); } int main(void) { int t, tests = sizeof(test_struct)/sizeof(test_struct[0]); for (t = 0; t < tests; ++t){ printf("\nTEST: %d\n\n", t+1); test_function(&test_struct[t]); } return 0; }