2 * Copyright (c) 2015 Ludmila Glinskih
3 * Copyright (c) 2001 Fabrice Bellard
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to deal
7 * in the Software without restriction, including without limitation the rights
8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 * copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 * Encodes raw data to FLAC format and decodes it back to raw. Compares raw-data
30 #include "libavcodec/avcodec.h"
31 #include "libavutil/common.h"
32 #include "libavutil/samplefmt.h"
34 #define NUMBER_OF_FRAMES 200
35 #define NAME_BUFF_SIZE 100
37 /* generate i-th frame of test audio */
38 static int generate_raw_frame(uint16_t *frame_data, int i, int sample_rate,
39 int channels, int frame_size)
43 for (j = 0; j < frame_size; j++) {
44 frame_data[channels * j] = 10000 * ((j / 10 * i) % 2);
45 for (k = 1; k < channels; k++)
46 frame_data[channels * j + k] = frame_data[channels * j] * (k + 1);
51 static int init_encoder(AVCodec *enc, AVCodecContext **enc_ctx,
52 int64_t ch_layout, int sample_rate)
56 char name_buff[NAME_BUFF_SIZE];
58 av_get_channel_layout_string(name_buff, NAME_BUFF_SIZE, 0, ch_layout);
59 av_log(NULL, AV_LOG_INFO, "channel layout: %s, sample rate: %i\n", name_buff, sample_rate);
61 ctx = avcodec_alloc_context3(enc);
63 av_log(NULL, AV_LOG_ERROR, "Can't allocate encoder context\n");
64 return AVERROR(ENOMEM);
67 ctx->sample_fmt = AV_SAMPLE_FMT_S16;
68 ctx->sample_rate = sample_rate;
69 ctx->channel_layout = ch_layout;
71 result = avcodec_open2(ctx, enc, NULL);
73 av_log(ctx, AV_LOG_ERROR, "Can't open encoder\n");
81 static int init_decoder(AVCodec *dec, AVCodecContext **dec_ctx,
87 ctx = avcodec_alloc_context3(dec);
89 av_log(NULL, AV_LOG_ERROR , "Can't allocate decoder context\n");
90 return AVERROR(ENOMEM);
93 ctx->request_sample_fmt = AV_SAMPLE_FMT_S16;
94 /* XXX: FLAC ignores it for some reason */
95 ctx->request_channel_layout = ch_layout;
96 ctx->channel_layout = ch_layout;
98 result = avcodec_open2(ctx, dec, NULL);
100 av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");
108 static int run_test(AVCodec *enc, AVCodec *dec, AVCodecContext *enc_ctx,
109 AVCodecContext *dec_ctx)
112 AVFrame *in_frame, *out_frame;
113 uint8_t *raw_in = NULL, *raw_out = NULL;
114 int in_offset = 0, out_offset = 0;
118 int in_frame_bytes, out_frame_bytes;
120 in_frame = av_frame_alloc();
122 av_log(NULL, AV_LOG_ERROR, "Can't allocate input frame\n");
123 return AVERROR(ENOMEM);
126 in_frame->nb_samples = enc_ctx->frame_size;
127 in_frame->format = enc_ctx->sample_fmt;
128 in_frame->channel_layout = enc_ctx->channel_layout;
129 if (av_frame_get_buffer(in_frame, 32) != 0) {
130 av_log(NULL, AV_LOG_ERROR, "Can't allocate a buffer for input frame\n");
131 return AVERROR(ENOMEM);
134 out_frame = av_frame_alloc();
136 av_log(NULL, AV_LOG_ERROR, "Can't allocate output frame\n");
137 return AVERROR(ENOMEM);
140 raw_in = av_malloc(in_frame->linesize[0] * NUMBER_OF_FRAMES);
142 av_log(NULL, AV_LOG_ERROR, "Can't allocate memory for raw_in\n");
143 return AVERROR(ENOMEM);
146 raw_out = av_malloc(in_frame->linesize[0] * NUMBER_OF_FRAMES);
148 av_log(NULL, AV_LOG_ERROR, "Can't allocate memory for raw_out\n");
149 return AVERROR(ENOMEM);
152 for (i = 0; i < NUMBER_OF_FRAMES; i++) {
153 av_init_packet(&enc_pkt);
157 generate_raw_frame((uint16_t*)(in_frame->data[0]), i, enc_ctx->sample_rate,
158 enc_ctx->channels, enc_ctx->frame_size);
159 in_frame_bytes = in_frame->nb_samples * av_frame_get_channels(in_frame) * sizeof(uint16_t);
160 if (in_frame_bytes > in_frame->linesize[0]) {
161 av_log(NULL, AV_LOG_ERROR, "Incorrect value of input frame linesize\n");
164 memcpy(raw_in + in_offset, in_frame->data[0], in_frame_bytes);
165 in_offset += in_frame_bytes;
166 result = avcodec_encode_audio2(enc_ctx, &enc_pkt, in_frame, &got_output);
168 av_log(NULL, AV_LOG_ERROR, "Error encoding audio frame\n");
172 /* if we get an encoded packet, feed it straight to the decoder */
174 result = avcodec_decode_audio4(dec_ctx, out_frame, &got_output, &enc_pkt);
176 av_log(NULL, AV_LOG_ERROR, "Error decoding audio packet\n");
181 if (result != enc_pkt.size) {
182 av_log(NULL, AV_LOG_INFO, "Decoder consumed only part of a packet, it is allowed to do so -- need to update this test\n");
183 return AVERROR_UNKNOWN;
186 if (in_frame->nb_samples != out_frame->nb_samples) {
187 av_log(NULL, AV_LOG_ERROR, "Error frames before and after decoding has different number of samples\n");
188 return AVERROR_UNKNOWN;
191 if (in_frame->channel_layout != out_frame->channel_layout) {
192 av_log(NULL, AV_LOG_ERROR, "Error frames before and after decoding has different channel layout\n");
193 return AVERROR_UNKNOWN;
196 if (in_frame->format != out_frame->format) {
197 av_log(NULL, AV_LOG_ERROR, "Error frames before and after decoding has different sample format\n");
198 return AVERROR_UNKNOWN;
200 out_frame_bytes = out_frame->nb_samples * av_frame_get_channels(out_frame) * sizeof(uint16_t);
201 if (out_frame_bytes > out_frame->linesize[0]) {
202 av_log(NULL, AV_LOG_ERROR, "Incorrect value of output frame linesize\n");
205 memcpy(raw_out + out_offset, out_frame->data[0], out_frame_bytes);
206 out_offset += out_frame_bytes;
209 av_packet_unref(&enc_pkt);
212 if (memcmp(raw_in, raw_out, out_frame_bytes * NUMBER_OF_FRAMES) != 0) {
213 av_log(NULL, AV_LOG_ERROR, "Output differs\n");
217 av_log(NULL, AV_LOG_INFO, "OK\n");
221 av_frame_free(&in_frame);
222 av_frame_free(&out_frame);
226 static int close_encoder(AVCodecContext **enc_ctx)
228 avcodec_close(*enc_ctx);
233 static int close_decoder(AVCodecContext **dec_ctx)
235 avcodec_close(*dec_ctx);
242 AVCodec *enc = NULL, *dec = NULL;
243 AVCodecContext *enc_ctx = NULL, *dec_ctx = NULL;
244 uint64_t channel_layouts[] = {AV_CH_LAYOUT_STEREO, AV_CH_LAYOUT_5POINT1_BACK, AV_CH_LAYOUT_SURROUND, AV_CH_LAYOUT_STEREO_DOWNMIX};
245 int sample_rates[] = {8000, 44100, 48000, 192000};
248 avcodec_register_all();
250 enc = avcodec_find_encoder(AV_CODEC_ID_FLAC);
252 av_log(NULL, AV_LOG_ERROR, "Can't find encoder\n");
256 dec = avcodec_find_decoder(AV_CODEC_ID_FLAC);
258 av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");
262 for (cl = 0; cl < FF_ARRAY_ELEMS(channel_layouts); cl++) {
263 for (sr = 0; sr < FF_ARRAY_ELEMS(sample_rates); sr++) {
264 if (init_encoder(enc, &enc_ctx, channel_layouts[cl], sample_rates[sr]) != 0)
266 if (init_decoder(dec, &dec_ctx, channel_layouts[cl]) != 0)
268 if (run_test(enc, dec, enc_ctx, dec_ctx) != 0)
270 close_encoder(&enc_ctx);
271 close_decoder(&dec_ctx);