mirror of
https://github.com/FFmpeg/FFmpeg.git
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284 lines
9.7 KiB
C
284 lines
9.7 KiB
C
/*
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* Copyright (c) 2015 Ludmila Glinskih
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* Copyright (c) 2001 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/*
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* FLAC codec test.
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* Encodes raw data to FLAC format and decodes it back to raw. Compares raw-data
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* after that.
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*/
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#include "libavcodec/avcodec.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/common.h"
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#include "libavutil/samplefmt.h"
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#define NUMBER_OF_AUDIO_FRAMES 200
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#define NAME_BUFF_SIZE 100
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/* generate i-th frame of test audio */
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static int generate_raw_frame(uint16_t *frame_data, int i, int sample_rate,
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int channels, int frame_size)
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{
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int j, k;
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for (j = 0; j < frame_size; j++) {
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frame_data[channels * j] = 10000 * ((j / 10 * i) % 2);
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for (k = 1; k < channels; k++)
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frame_data[channels * j + k] = frame_data[channels * j] * (k + 1);
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}
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return 0;
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}
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static int init_encoder(const AVCodec *enc, AVCodecContext **enc_ctx,
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const AVChannelLayout *ch_layout, int sample_rate)
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{
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AVCodecContext *ctx;
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int result;
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char name_buff[NAME_BUFF_SIZE];
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av_channel_layout_describe(ch_layout, name_buff, NAME_BUFF_SIZE);
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av_log(NULL, AV_LOG_INFO, "channel layout: %s, sample rate: %i\n", name_buff, sample_rate);
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ctx = avcodec_alloc_context3(enc);
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if (!ctx) {
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av_log(NULL, AV_LOG_ERROR, "Can't allocate encoder context\n");
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return AVERROR(ENOMEM);
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}
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ctx->sample_fmt = AV_SAMPLE_FMT_S16;
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ctx->sample_rate = sample_rate;
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av_channel_layout_copy(&ctx->ch_layout, ch_layout);
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result = avcodec_open2(ctx, enc, NULL);
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if (result < 0) {
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av_log(ctx, AV_LOG_ERROR, "Can't open encoder\n");
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return result;
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}
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*enc_ctx = ctx;
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return 0;
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}
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static int init_decoder(const AVCodec *dec, AVCodecContext **dec_ctx,
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const AVChannelLayout *ch_layout)
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{
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AVCodecContext *ctx;
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int result;
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ctx = avcodec_alloc_context3(dec);
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if (!ctx) {
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av_log(NULL, AV_LOG_ERROR , "Can't allocate decoder context\n");
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return AVERROR(ENOMEM);
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}
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ctx->request_sample_fmt = AV_SAMPLE_FMT_S16;
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av_channel_layout_copy(&ctx->ch_layout, ch_layout);
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result = avcodec_open2(ctx, dec, NULL);
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if (result < 0) {
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av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");
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return result;
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}
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*dec_ctx = ctx;
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return 0;
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}
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static int run_test(const AVCodec *enc, const AVCodec *dec,
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AVCodecContext *enc_ctx, AVCodecContext *dec_ctx)
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{
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AVPacket *enc_pkt;
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AVFrame *in_frame, *out_frame;
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uint8_t *raw_in = NULL, *raw_out = NULL;
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int in_offset = 0, out_offset = 0;
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int result = 0;
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int i = 0;
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int in_frame_bytes, out_frame_bytes;
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enc_pkt = av_packet_alloc();
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if (!enc_pkt) {
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av_log(NULL, AV_LOG_ERROR, "Can't allocate output packet\n");
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return AVERROR(ENOMEM);
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}
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in_frame = av_frame_alloc();
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if (!in_frame) {
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av_log(NULL, AV_LOG_ERROR, "Can't allocate input frame\n");
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return AVERROR(ENOMEM);
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}
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in_frame->nb_samples = enc_ctx->frame_size;
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in_frame->format = enc_ctx->sample_fmt;
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result = av_channel_layout_copy(&in_frame->ch_layout, &enc_ctx->ch_layout);
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if (result < 0)
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return result;
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if (av_frame_get_buffer(in_frame, 0) != 0) {
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av_log(NULL, AV_LOG_ERROR, "Can't allocate a buffer for input frame\n");
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return AVERROR(ENOMEM);
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}
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out_frame = av_frame_alloc();
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if (!out_frame) {
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av_log(NULL, AV_LOG_ERROR, "Can't allocate output frame\n");
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return AVERROR(ENOMEM);
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}
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raw_in = av_malloc(in_frame->linesize[0] * NUMBER_OF_AUDIO_FRAMES);
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if (!raw_in) {
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av_log(NULL, AV_LOG_ERROR, "Can't allocate memory for raw_in\n");
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return AVERROR(ENOMEM);
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}
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raw_out = av_malloc(in_frame->linesize[0] * NUMBER_OF_AUDIO_FRAMES);
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if (!raw_out) {
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av_log(NULL, AV_LOG_ERROR, "Can't allocate memory for raw_out\n");
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return AVERROR(ENOMEM);
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}
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for (i = 0; i < NUMBER_OF_AUDIO_FRAMES; i++) {
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result = av_frame_make_writable(in_frame);
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if (result < 0)
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return result;
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generate_raw_frame((uint16_t*)(in_frame->data[0]), i, enc_ctx->sample_rate,
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enc_ctx->ch_layout.nb_channels, enc_ctx->frame_size);
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in_frame_bytes = in_frame->nb_samples * in_frame->ch_layout.nb_channels * sizeof(uint16_t);
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if (in_frame_bytes > in_frame->linesize[0]) {
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av_log(NULL, AV_LOG_ERROR, "Incorrect value of input frame linesize\n");
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return 1;
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}
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memcpy(raw_in + in_offset, in_frame->data[0], in_frame_bytes);
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in_offset += in_frame_bytes;
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result = avcodec_send_frame(enc_ctx, in_frame);
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if (result < 0) {
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av_log(NULL, AV_LOG_ERROR, "Error submitting a frame for encoding\n");
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return result;
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}
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while (result >= 0) {
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result = avcodec_receive_packet(enc_ctx, enc_pkt);
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if (result == AVERROR(EAGAIN))
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break;
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else if (result < 0 && result != AVERROR_EOF) {
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av_log(NULL, AV_LOG_ERROR, "Error encoding audio frame\n");
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return result;
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}
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/* if we get an encoded packet, feed it straight to the decoder */
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result = avcodec_send_packet(dec_ctx, enc_pkt);
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av_packet_unref(enc_pkt);
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if (result < 0) {
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av_log(NULL, AV_LOG_ERROR, "Error submitting a packet for decoding\n");
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return result;
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}
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result = avcodec_receive_frame(dec_ctx, out_frame);
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if (result == AVERROR(EAGAIN)) {
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result = 0;
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continue;
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} else if (result == AVERROR(EOF)) {
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result = 0;
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break;
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} else if (result < 0) {
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av_log(NULL, AV_LOG_ERROR, "Error decoding audio packet\n");
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return result;
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}
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if (in_frame->nb_samples != out_frame->nb_samples) {
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av_log(NULL, AV_LOG_ERROR, "Error frames before and after decoding has different number of samples\n");
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return AVERROR_UNKNOWN;
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}
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if (av_channel_layout_compare(&in_frame->ch_layout, &out_frame->ch_layout)) {
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av_log(NULL, AV_LOG_ERROR, "Error frames before and after decoding has different channel layout\n");
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return AVERROR_UNKNOWN;
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}
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if (in_frame->format != out_frame->format) {
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av_log(NULL, AV_LOG_ERROR, "Error frames before and after decoding has different sample format\n");
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return AVERROR_UNKNOWN;
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}
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out_frame_bytes = out_frame->nb_samples * out_frame->ch_layout.nb_channels * sizeof(uint16_t);
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if (out_frame_bytes > out_frame->linesize[0]) {
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av_log(NULL, AV_LOG_ERROR, "Incorrect value of output frame linesize\n");
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return 1;
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}
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memcpy(raw_out + out_offset, out_frame->data[0], out_frame_bytes);
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out_offset += out_frame_bytes;
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}
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}
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if (memcmp(raw_in, raw_out, out_frame_bytes * NUMBER_OF_AUDIO_FRAMES) != 0) {
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av_log(NULL, AV_LOG_ERROR, "Output differs\n");
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return 1;
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}
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av_log(NULL, AV_LOG_INFO, "OK\n");
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av_freep(&raw_in);
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av_freep(&raw_out);
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av_packet_free(&enc_pkt);
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av_frame_free(&in_frame);
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av_frame_free(&out_frame);
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return 0;
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}
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int main(void)
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{
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const AVCodec *enc = NULL, *dec = NULL;
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AVCodecContext *enc_ctx = NULL, *dec_ctx = NULL;
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const AVChannelLayout channel_layouts[] = { AV_CHANNEL_LAYOUT_STEREO,
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AV_CHANNEL_LAYOUT_5POINT1_BACK,
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AV_CHANNEL_LAYOUT_SURROUND,
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AV_CHANNEL_LAYOUT_STEREO_DOWNMIX };
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int sample_rates[] = {8000, 44100, 48000, 192000};
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int cl, sr;
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enc = avcodec_find_encoder(AV_CODEC_ID_FLAC);
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if (!enc) {
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av_log(NULL, AV_LOG_ERROR, "Can't find encoder\n");
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return 1;
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}
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dec = avcodec_find_decoder(AV_CODEC_ID_FLAC);
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if (!dec) {
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av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");
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return 1;
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}
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for (cl = 0; cl < FF_ARRAY_ELEMS(channel_layouts); cl++) {
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for (sr = 0; sr < FF_ARRAY_ELEMS(sample_rates); sr++) {
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if (init_encoder(enc, &enc_ctx, &channel_layouts[cl], sample_rates[sr]) != 0)
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return 1;
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if (init_decoder(dec, &dec_ctx, &channel_layouts[cl]) != 0)
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return 1;
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if (run_test(enc, dec, enc_ctx, dec_ctx) != 0)
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return 1;
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avcodec_free_context(&enc_ctx);
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avcodec_free_context(&dec_ctx);
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}
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}
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return 0;
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}
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