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api-flac-test.c
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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_FRAMES 200
35 #define NAME_BUFF_SIZE 100
36 
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)
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 
51 static int init_encoder(AVCodec *enc, AVCodecContext **enc_ctx,
52  int64_t ch_layout, int sample_rate)
53 {
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 
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 
82  int64_t ch_layout)
83 {
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 
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 
108 static int run_test(AVCodec *enc, AVCodec *dec, AVCodecContext *enc_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, 32) != 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_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_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_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_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 
226 static int close_encoder(AVCodecContext **enc_ctx)
227 {
228  avcodec_close(*enc_ctx);
229  av_freep(enc_ctx);
230  return 0;
231 }
232 
234 {
235  avcodec_close(*dec_ctx);
236  av_freep(dec_ctx);
237  return 0;
238 }
239 
240 int main(void)
241 {
242  AVCodec *enc = NULL, *dec = NULL;
243  AVCodecContext *enc_ctx = NULL, *dec_ctx = NULL;
245  int sample_rates[] = {8000, 44100, 48000, 192000};
246  int cl, sr;
247 
249  if (!enc) {
250  av_log(NULL, AV_LOG_ERROR, "Can't find encoder\n");
251  return 1;
252  }
253 
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 }
#define NULL
Definition: coverity.c:32
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
AVCodec * avcodec_find_encoder(enum AVCodecID id)
Find a registered encoder with a matching codec ID.
Definition: allcodecs.c:866
static int run_test(AVCodec *enc, AVCodec *dec, AVCodecContext *enc_ctx, AVCodecContext *dec_ctx)
#define AV_CH_LAYOUT_SURROUND
channels
Definition: aptx.c:30
int size
Definition: avcodec.h:1434
attribute_deprecated int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Encode a frame of audio.
Definition: encode.c:118
attribute_deprecated int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, const AVPacket *avpkt)
Decode the audio frame of size avpkt->size from avpkt->data into frame.
Definition: decode.c:864
#define AV_CH_LAYOUT_STEREO
AVCodec.
Definition: avcodec.h:3411
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2184
uint8_t
#define av_malloc(s)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:189
#define NUMBER_OF_FRAMES
Definition: api-flac-test.c:34
uint8_t * data
Definition: avcodec.h:1433
#define av_log(a,...)
int avcodec_close(AVCodecContext *avctx)
Close a given AVCodecContext and free all the data associated with it (but not the AVCodecContext its...
Definition: utils.c:1069
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
enum AVSampleFormat request_sample_fmt
desired sample format
Definition: avcodec.h:2249
#define NAME_BUFF_SIZE
Definition: api-flac-test.c:35
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2227
uint64_t channel_layout
Channel layout of the audio data.
Definition: frame.h:396
int channels
number of audio channels, only used for audio.
Definition: frame.h:523
#define AV_CH_LAYOUT_STEREO_DOWNMIX
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:156
AVFormatContext * ctx
Definition: movenc.c:48
#define AV_CH_LAYOUT_5POINT1_BACK
#define FF_ARRAY_ELEMS(a)
void av_get_channel_layout_string(char *buf, int buf_size, int nb_channels, uint64_t channel_layout)
Return a description of a channel layout.
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:291
int frame_size
Number of samples per channel in an audio frame.
Definition: avcodec.h:2196
sample_rate
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
int frame_size
Definition: mxfenc.c:2117
Libavcodec external API header.
int sample_rate
samples per second
Definition: avcodec.h:2176
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:249
static int close_encoder(AVCodecContext **enc_ctx)
main external API structure.
Definition: avcodec.h:1521
AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: allcodecs.c:871
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:592
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:113
static int init_encoder(AVCodec *enc, AVCodecContext **enc_ctx, int64_t ch_layout, int sample_rate)
Definition: api-flac-test.c:51
int main(void)
int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: utils.c:538
int av_frame_get_buffer(AVFrame *frame, int align)
Allocate new buffer(s) for audio or video data.
Definition: frame.c:322
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:232
sample_rates
common internal and external API header
signed 16 bits
Definition: samplefmt.h:61
static AVCodecContext * dec_ctx
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
static int generate_raw_frame(uint16_t *frame_data, int i, int sample_rate, int channels, int frame_size)
Definition: api-flac-test.c:38
int channels
number of audio channels
Definition: avcodec.h:2177
static int close_decoder(AVCodecContext **dec_ctx)
static int init_decoder(AVCodec *dec, AVCodecContext **dec_ctx, int64_t ch_layout)
Definition: api-flac-test.c:81
#define av_freep(p)
uint64_t request_channel_layout
Request decoder to use this channel layout if it can (0 for default)
Definition: avcodec.h:2234
This structure stores compressed data.
Definition: avcodec.h:1410
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:284