libavcodec: Add FLAC API test

Signed-off-by: Ludmila Glinskih <lglinskih@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/Makefile

@@ -885,6 +885,7 @@ TESTPROGS = imgconvert                                                  \
             options                                                     \
             avfft                                                       \
 
+TESTPROGS += api-flac
 
 TESTPROGS-$(CONFIG_CABAC)                 += cabac
 TESTPROGS-$(CONFIG_FFT)                   += fft fft-fixed fft-fixed32

libavcodec/api-flac-test.c

@@ -0,0 +1,290 @@
+/*
+ * Copyright (c) 2015 Ludmila Glinskih
+ * Copyright (c) 2001 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+/*
+ * FLAC codec test.
+ * Encodes raw data to FLAC format and decodes it back to raw. Compares raw-data
+ * after that.
+ */
+
+#include "avcodec.h"
+#include "libavutil/common.h"
+#include "libavutil/samplefmt.h"
+
+#define NUMBER_OF_FRAMES 200
+#define NAME_BUFF_SIZE 100
+
+/* generate i-th frame of test audio */
+static int generate_raw_frame(uint16_t *frame_data, int i, int sample_rate,
+                              int channels, int frame_size)
+{
+    int j, k;
+
+    for (j = 0; j < frame_size; j++)
+    {
+        frame_data[channels * j] = 10000 * ((j / 10 * i) % 2);
+        for (k = 1; k < channels; k++)
+            frame_data[channels * j + k] = frame_data[channels * j] * (k + 1);
+    }
+    return 0;
+}
+
+static int init_encoder(AVCodec *enc, AVCodecContext **enc_ctx,
+                        int64_t ch_layout, int sample_rate)
+{
+    AVCodecContext *ctx;
+    int result;
+    char name_buff[NAME_BUFF_SIZE];
+
+    av_get_channel_layout_string(name_buff, NAME_BUFF_SIZE, 0, ch_layout);
+    av_log(NULL, AV_LOG_INFO, "channel layout: %s, sample rate: %i\n", name_buff, sample_rate);
+
+    ctx = avcodec_alloc_context3(enc);
+    if (!ctx)
+    {
+        av_log(NULL, AV_LOG_ERROR, "Can't allocate encoder context\n");
+        return AVERROR(ENOMEM);
+    }
+
+    ctx->sample_fmt = AV_SAMPLE_FMT_S16;
+    ctx->sample_rate = sample_rate;
+    ctx->channel_layout = ch_layout;
+
+    result = avcodec_open2(ctx, enc, NULL);
+    if (result < 0)
+    {
+        av_log(ctx, AV_LOG_ERROR, "Can't open encoder\n");
+        return result;
+    }
+
+    *enc_ctx = ctx;
+    return 0;
+}
+
+static int init_decoder(AVCodec *dec, AVCodecContext **dec_ctx,
+                        int64_t ch_layout)
+{
+    AVCodecContext *ctx;
+    int result;
+
+    ctx = avcodec_alloc_context3(dec);
+    if (!ctx)
+    {
+        av_log(NULL, AV_LOG_ERROR , "Can't allocate decoder context\n");
+        return AVERROR(ENOMEM);
+    }
+
+    ctx->request_sample_fmt = AV_SAMPLE_FMT_S16;
+    /* XXX: FLAC ignores it for some reason */
+    ctx->request_channel_layout = ch_layout;
+    ctx->channel_layout = ch_layout;
+
+    result = avcodec_open2(ctx, dec, NULL);
+    if (result < 0)
+    {
+        av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n");
+        return result;
+    }
+
+    *dec_ctx = ctx;
+    return 0;
+}
+
+static int run_test(AVCodec *enc, AVCodec *dec, AVCodecContext *enc_ctx,
+                    AVCodecContext *dec_ctx)
+{
+    AVPacket enc_pkt;
+    AVFrame *in_frame, *out_frame;
+    uint8_t *raw_in = NULL, *raw_out = NULL;
+    int in_offset = 0, out_offset = 0;
+    int frame_data_size = 0;
+    int result = 0;
+    int got_output = 0;
+    int i = 0;
+
+    in_frame = av_frame_alloc();
+    if (!in_frame)
+    {
+        av_log(NULL, AV_LOG_ERROR, "Can't allocate input frame\n");
+        return AVERROR(ENOMEM);
+    }
+
+    in_frame->nb_samples = enc_ctx->frame_size;
+    in_frame->format = enc_ctx->sample_fmt;
+    in_frame->channel_layout = enc_ctx->channel_layout;
+    if (av_frame_get_buffer(in_frame, 32) != 0)
+    {
+        av_log(NULL, AV_LOG_ERROR, "Can't allocate a buffer for input frame\n");
+        return AVERROR(ENOMEM);
+    }
+
+    out_frame = av_frame_alloc();
+    if (!out_frame)
+    {
+        av_log(NULL, AV_LOG_ERROR, "Can't allocate output frame\n");
+        return AVERROR(ENOMEM);
+    }
+
+    raw_in = av_malloc(in_frame->linesize[0] * NUMBER_OF_FRAMES);
+    if (!raw_in)
+    {
+        av_log(NULL, AV_LOG_ERROR, "Can't allocate memory for raw_in\n");
+        return AVERROR(ENOMEM);
+    }
+
+    raw_out = av_malloc(in_frame->linesize[0] * NUMBER_OF_FRAMES);
+    if (!raw_out)
+    {
+        av_log(NULL, AV_LOG_ERROR, "Can't allocate memory for raw_out\n");
+        return AVERROR(ENOMEM);
+    }
+
+    for (i = 0; i < NUMBER_OF_FRAMES; i++)
+    {
+        av_init_packet(&enc_pkt);
+        enc_pkt.data = NULL;
+        enc_pkt.size = 0;
+
+        generate_raw_frame((uint16_t*)(in_frame->data[0]), i, enc_ctx->sample_rate,
+                           enc_ctx->channels, enc_ctx->frame_size);
+        memcpy(raw_in + in_offset, in_frame->data[0], in_frame->linesize[0]);
+        in_offset += in_frame->linesize[0];
+        result = avcodec_encode_audio2(enc_ctx, &enc_pkt, in_frame, &got_output);
+        if (result < 0)
+        {
+            av_log(NULL, AV_LOG_ERROR, "Error encoding audio frame\n");
+            return result;
+        }
+
+        /* if we get an encoded packet, feed it straight to the decoder */
+        if (got_output)
+        {
+            result = avcodec_decode_audio4(dec_ctx, out_frame, &got_output, &enc_pkt);
+            if (result < 0)
+            {
+                av_log(NULL, AV_LOG_ERROR, "Error decoding audio packet\n");
+                return result;
+            }
+
+            if (got_output)
+            {
+                if (result != enc_pkt.size)
+                {
+                    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");
+                    return AVERROR_UNKNOWN;
+                }
+
+                if (in_frame->nb_samples != out_frame->nb_samples)
+                {
+                    av_log(NULL, AV_LOG_ERROR, "Error frames before and after decoding has different number of samples\n");
+                    return AVERROR_UNKNOWN;
+                }
+
+                if (in_frame->channel_layout != out_frame->channel_layout)
+                {
+                    av_log(NULL, AV_LOG_ERROR, "Error frames before and after decoding has different channel layout\n");
+                    return AVERROR_UNKNOWN;
+                }
+
+                if (in_frame->format != out_frame->format)
+                {
+                    av_log(NULL, AV_LOG_ERROR, "Error frames before and after decoding has different sample format\n");
+                    return AVERROR_UNKNOWN;
+                }
+                memcpy(raw_out + out_offset, out_frame->data[0], out_frame->linesize[0]);
+                out_offset += out_frame->linesize[0];
+            }
+        }
+        av_free_packet(&enc_pkt);
+    }
+
+    if (memcmp(raw_in, raw_out, frame_data_size * NUMBER_OF_FRAMES) != 0)
+    {
+        av_log(NULL, AV_LOG_ERROR, "Output differs\n");
+        return 1;
+    }
+
+    av_log(NULL, AV_LOG_INFO, "OK\n");
+
+    av_freep(&raw_in);
+    av_freep(&raw_out);
+    av_frame_free(&in_frame);
+    av_frame_free(&out_frame);
+    return 0;
+}
+
+static int close_encoder(AVCodecContext *enc_ctx)
+{
+    avcodec_close(enc_ctx);
+    av_freep(&enc_ctx);
+    return 0;
+}
+
+static int close_decoder(AVCodecContext *dec_ctx)
+{
+    avcodec_close(dec_ctx);
+    av_freep(&dec_ctx);
+    return 0;
+}
+
+int main(void)
+{
+    AVCodec *enc = NULL, *dec = NULL;
+    AVCodecContext *enc_ctx = NULL, *dec_ctx = NULL;
+    uint64_t channel_layouts[] = {AV_CH_LAYOUT_STEREO, AV_CH_LAYOUT_5POINT1_BACK, AV_CH_LAYOUT_SURROUND, AV_CH_LAYOUT_STEREO_DOWNMIX};
+    int sample_rates[] = {8000, 44100, 48000, 192000};
+    int cl, sr;
+
+    avcodec_register_all();
+
+    enc = avcodec_find_encoder(AV_CODEC_ID_FLAC);
+    if (!enc)
+    {
+        av_log(NULL, AV_LOG_ERROR, "Can't find encoder\n");
+        return 1;
+    }
+
+    dec = avcodec_find_decoder(AV_CODEC_ID_FLAC);
+    if (!dec)
+    {
+        av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n");
+        return 1;
+    }
+
+    for (cl = 0; cl < FF_ARRAY_ELEMS(channel_layouts); cl++)
+    {
+        for (sr = 0; sr < FF_ARRAY_ELEMS(sample_rates); sr++)
+        {
+            if (init_encoder(enc, &enc_ctx, channel_layouts[cl], sample_rates[sr]) != 0)
+                return 1;
+            if (init_decoder(dec, &dec_ctx, channel_layouts[cl]) != 0)
+                return 1;
+            if (run_test(enc, dec, enc_ctx, dec_ctx) != 0)
+                return 1;
+            close_encoder(enc_ctx);
+            close_decoder(dec_ctx);
+        }
+    }
+
+    return 0;
+}

tests/fate/libavcodec.mak

@@ -28,5 +28,11 @@ fate-rangecoder: CMD = run libavcodec/rangecoder-test
 fate-rangecoder: CMP = null
 fate-rangecoder: REF = /dev/null
 
+FATE_LIBAVCODEC-$(call ENCDEC, FLAC, FLAC) += fate-api-flac
+fate-api-flac: libavcodec/api-flac-test$(EXESUF)
+fate-api-flac: CMD = run libavcodec/api-flac-test
+fate-api-flac: CMP = null
+fate-api-flac: REF = /dev/null
+
 FATE-$(CONFIG_AVCODEC) += $(FATE_LIBAVCODEC-yes)
 fate-libavcodec: $(FATE_LIBAVCODEC-yes)