FFmpeg
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_AUDIO_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_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 
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:295
AVCodec * avcodec_find_encoder(enum AVCodecID id)
Find a registered encoder with a matching codec ID.
Definition: allcodecs.c:889
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:1481
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:904
#define AV_CH_LAYOUT_STEREO
AVCodec.
Definition: avcodec.h:3484
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2236
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
uint8_t * data
Definition: avcodec.h:1480
#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:1084
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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:2301
#define NAME_BUFF_SIZE
Definition: api-flac-test.c:35
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2279
uint64_t channel_layout
Channel layout of the audio data.
Definition: frame.h:472
int channels
number of audio channels, only used for audio.
Definition: frame.h:601
#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:368
int frame_size
Number of samples per channel in an audio frame.
Definition: avcodec.h:2248
sample_rate
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
int frame_size
Definition: mxfenc.c:2214
Libavcodec external API header.
int sample_rate
samples per second
Definition: avcodec.h:2228
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
static int close_encoder(AVCodecContext **enc_ctx)
main external API structure.
Definition: avcodec.h:1568
AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: allcodecs.c:894
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:599
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:542
int av_frame_get_buffer(AVFrame *frame, int align)
Allocate new buffer(s) for audio or video data.
Definition: frame.c:324
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
#define NUMBER_OF_AUDIO_FRAMES
Definition: api-flac-test.c:34
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:2229
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
and forward the result(frame or status change) to the corresponding input.If nothing is possible
#define av_freep(p)
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
uint64_t request_channel_layout
Request decoder to use this channel layout if it can (0 for default)
Definition: avcodec.h:2286
This structure stores compressed data.
Definition: avcodec.h:1457
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:361