1 /*
2 * Copyright (c) 2015 Ludmila Glinskih
3 * Copyright (c) 2001 Fabrice Bellard
4 *
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:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
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
21 * THE SOFTWARE.
22 */
23
24 /*
25 * FLAC codec test.
26 * Encodes raw data to FLAC format and decodes it back to raw. Compares raw-data
27 * after that.
28 */
29
30 #include "libavcodec/avcodec.h"
31 #include "libavutil/common.h"
32 #include "libavutil/samplefmt.h"
33
34 #define NUMBER_OF_AUDIO_FRAMES 200
35 #define NAME_BUFF_SIZE 100
36
37 /* generate i-th frame of test audio */
generate_raw_frame(uint16_t * frame_data,int i,int sample_rate,int channels,int frame_size)38 static int generate_raw_frame(uint16_t *frame_data, int i, int sample_rate,
39 int channels, int frame_size)
40 {
41 int j, k;
42
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);
47 }
48 return 0;
49 }
50
init_encoder(AVCodec * enc,AVCodecContext ** enc_ctx,int64_t ch_layout,int sample_rate)51 static int init_encoder(AVCodec *enc, AVCodecContext **enc_ctx,
52 int64_t ch_layout, int sample_rate)
53 {
54 AVCodecContext *ctx;
55 int result;
56 char name_buff[NAME_BUFF_SIZE];
57
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);
60
61 ctx = avcodec_alloc_context3(enc);
62 if (!ctx) {
63 av_log(NULL, AV_LOG_ERROR, "Can't allocate encoder context\n");
64 return AVERROR(ENOMEM);
65 }
66
67 ctx->sample_fmt = AV_SAMPLE_FMT_S16;
68 ctx->sample_rate = sample_rate;
69 ctx->channel_layout = ch_layout;
70
71 result = avcodec_open2(ctx, enc, NULL);
72 if (result < 0) {
73 av_log(ctx, AV_LOG_ERROR, "Can't open encoder\n");
74 return result;
75 }
76
77 *enc_ctx = ctx;
78 return 0;
79 }
80
init_decoder(AVCodec * dec,AVCodecContext ** dec_ctx,int64_t ch_layout)81 static int init_decoder(AVCodec *dec, AVCodecContext **dec_ctx,
82 int64_t ch_layout)
83 {
84 AVCodecContext *ctx;
85 int result;
86
87 ctx = avcodec_alloc_context3(dec);
88 if (!ctx) {
89 av_log(NULL, AV_LOG_ERROR , "Can't allocate decoder context\n");
90 return AVERROR(ENOMEM);
91 }
92
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;
97
98 result = avcodec_open2(ctx, dec, NULL);
99 if (result < 0) {
100 av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");
101 return result;
102 }
103
104 *dec_ctx = ctx;
105 return 0;
106 }
107
run_test(AVCodec * enc,AVCodec * dec,AVCodecContext * enc_ctx,AVCodecContext * dec_ctx)108 static int run_test(AVCodec *enc, AVCodec *dec, AVCodecContext *enc_ctx,
109 AVCodecContext *dec_ctx)
110 {
111 AVPacket enc_pkt;
112 AVFrame *in_frame, *out_frame;
113 uint8_t *raw_in = NULL, *raw_out = NULL;
114 int in_offset = 0, out_offset = 0;
115 int result = 0;
116 int got_output = 0;
117 int i = 0;
118 int in_frame_bytes, out_frame_bytes;
119
120 in_frame = av_frame_alloc();
121 if (!in_frame) {
122 av_log(NULL, AV_LOG_ERROR, "Can't allocate input frame\n");
123 return AVERROR(ENOMEM);
124 }
125
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, 0) != 0) {
130 av_log(NULL, AV_LOG_ERROR, "Can't allocate a buffer for input frame\n");
131 return AVERROR(ENOMEM);
132 }
133
134 out_frame = av_frame_alloc();
135 if (!out_frame) {
136 av_log(NULL, AV_LOG_ERROR, "Can't allocate output frame\n");
137 return AVERROR(ENOMEM);
138 }
139
140 raw_in = av_malloc(in_frame->linesize[0] * NUMBER_OF_AUDIO_FRAMES);
141 if (!raw_in) {
142 av_log(NULL, AV_LOG_ERROR, "Can't allocate memory for raw_in\n");
143 return AVERROR(ENOMEM);
144 }
145
146 raw_out = av_malloc(in_frame->linesize[0] * NUMBER_OF_AUDIO_FRAMES);
147 if (!raw_out) {
148 av_log(NULL, AV_LOG_ERROR, "Can't allocate memory for raw_out\n");
149 return AVERROR(ENOMEM);
150 }
151
152 for (i = 0; i < NUMBER_OF_AUDIO_FRAMES; i++) {
153 av_init_packet(&enc_pkt);
154 enc_pkt.data = NULL;
155 enc_pkt.size = 0;
156
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 * in_frame->channels * 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");
162 return 1;
163 }
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);
167 if (result < 0) {
168 av_log(NULL, AV_LOG_ERROR, "Error encoding audio frame\n");
169 return result;
170 }
171
172 /* if we get an encoded packet, feed it straight to the decoder */
173 if (got_output) {
174 result = avcodec_decode_audio4(dec_ctx, out_frame, &got_output, &enc_pkt);
175 if (result < 0) {
176 av_log(NULL, AV_LOG_ERROR, "Error decoding audio packet\n");
177 return result;
178 }
179
180 if (got_output) {
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;
184 }
185
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;
189 }
190
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;
194 }
195
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;
199 }
200 out_frame_bytes = out_frame->nb_samples * out_frame->channels * 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");
203 return 1;
204 }
205 memcpy(raw_out + out_offset, out_frame->data[0], out_frame_bytes);
206 out_offset += out_frame_bytes;
207 }
208 }
209 av_packet_unref(&enc_pkt);
210 }
211
212 if (memcmp(raw_in, raw_out, out_frame_bytes * NUMBER_OF_AUDIO_FRAMES) != 0) {
213 av_log(NULL, AV_LOG_ERROR, "Output differs\n");
214 return 1;
215 }
216
217 av_log(NULL, AV_LOG_INFO, "OK\n");
218
219 av_freep(&raw_in);
220 av_freep(&raw_out);
221 av_frame_free(&in_frame);
222 av_frame_free(&out_frame);
223 return 0;
224 }
225
close_encoder(AVCodecContext ** enc_ctx)226 static int close_encoder(AVCodecContext **enc_ctx)
227 {
228 avcodec_close(*enc_ctx);
229 av_freep(enc_ctx);
230 return 0;
231 }
232
close_decoder(AVCodecContext ** dec_ctx)233 static int close_decoder(AVCodecContext **dec_ctx)
234 {
235 avcodec_close(*dec_ctx);
236 av_freep(dec_ctx);
237 return 0;
238 }
239
main(void)240 int main(void)
241 {
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};
246 int cl, sr;
247
248 enc = avcodec_find_encoder(AV_CODEC_ID_FLAC);
249 if (!enc) {
250 av_log(NULL, AV_LOG_ERROR, "Can't find encoder\n");
251 return 1;
252 }
253
254 dec = avcodec_find_decoder(AV_CODEC_ID_FLAC);
255 if (!dec) {
256 av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");
257 return 1;
258 }
259
260 for (cl = 0; cl < FF_ARRAY_ELEMS(channel_layouts); cl++) {
261 for (sr = 0; sr < FF_ARRAY_ELEMS(sample_rates); sr++) {
262 if (init_encoder(enc, &enc_ctx, channel_layouts[cl], sample_rates[sr]) != 0)
263 return 1;
264 if (init_decoder(dec, &dec_ctx, channel_layouts[cl]) != 0)
265 return 1;
266 if (run_test(enc, dec, enc_ctx, dec_ctx) != 0)
267 return 1;
268 close_encoder(&enc_ctx);
269 close_decoder(&dec_ctx);
270 }
271 }
272
273 return 0;
274 }
275