| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * This file is part of FFmpeg. | ||
| 3 | * | ||
| 4 | * FFmpeg is free software; you can redistribute it and/or | ||
| 5 | * modify it under the terms of the GNU Lesser General Public | ||
| 6 | * License as published by the Free Software Foundation; either | ||
| 7 | * version 2.1 of the License, or (at your option) any later version. | ||
| 8 | * | ||
| 9 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 12 | * Lesser General Public License for more details. | ||
| 13 | * | ||
| 14 | * You should have received a copy of the GNU Lesser General Public | ||
| 15 | * License along with FFmpeg; if not, write to the Free Software | ||
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 17 | */ | ||
| 18 | |||
| 19 | /** | ||
| 20 | * Print encoder properties (bit_rate, block_align, bits_per_coded_sample, | ||
| 21 | * frame_size) after init. | ||
| 22 | * Useful for verifying that encoders correctly set their codec parameters. | ||
| 23 | * | ||
| 24 | * Usage: encinfo <codec_name> [sample_rate] [channels] | ||
| 25 | */ | ||
| 26 | |||
| 27 | #include <stdio.h> | ||
| 28 | #include <stdlib.h> | ||
| 29 | |||
| 30 | #include "libavcodec/avcodec.h" | ||
| 31 | #include "libavutil/channel_layout.h" | ||
| 32 | |||
| 33 | 2 | int main(int argc, char **argv) | |
| 34 | { | ||
| 35 | const AVCodec *codec; | ||
| 36 | AVCodecContext *ctx; | ||
| 37 | 2 | int sample_rate = 44100; | |
| 38 | 2 | int channels = 2; | |
| 39 | int ret; | ||
| 40 | |||
| 41 |
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2 | if (argc < 2) { |
| 42 | ✗ | fprintf(stderr, "Usage: %s <codec_name> [sample_rate] [channels]\n", | |
| 43 | argv[0]); | ||
| 44 | ✗ | return 1; | |
| 45 | } | ||
| 46 | |||
| 47 |
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2 | if (argc >= 3) |
| 48 | ✗ | sample_rate = atoi(argv[2]); | |
| 49 |
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2 | if (argc >= 4) |
| 50 | ✗ | channels = atoi(argv[3]); | |
| 51 | |||
| 52 | 2 | codec = avcodec_find_encoder_by_name(argv[1]); | |
| 53 |
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2 | if (!codec) { |
| 54 | ✗ | fprintf(stderr, "Encoder '%s' not found\n", argv[1]); | |
| 55 | ✗ | return 1; | |
| 56 | } | ||
| 57 | |||
| 58 | 2 | ctx = avcodec_alloc_context3(codec); | |
| 59 |
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2 | if (!ctx) |
| 60 | ✗ | return AVERROR(ENOMEM); | |
| 61 | |||
| 62 | 2 | ctx->sample_rate = sample_rate; | |
| 63 | const void *sample_fmts; | ||
| 64 | 2 | ret = avcodec_get_supported_config(ctx, NULL, AV_CODEC_CONFIG_SAMPLE_FORMAT, 0, &sample_fmts, NULL); | |
| 65 |
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2 | if (ret < 0) { |
| 66 | ✗ | fprintf(stderr, "avcodec_get_supported_config failed: %d\n", ret); | |
| 67 | ✗ | avcodec_free_context(&ctx); | |
| 68 | ✗ | return 1; | |
| 69 | } | ||
| 70 |
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2 | ctx->sample_fmt = sample_fmts ? *(const enum AVSampleFormat*)sample_fmts : AV_SAMPLE_FMT_S16; |
| 71 | 2 | av_channel_layout_default(&ctx->ch_layout, channels); | |
| 72 | |||
| 73 | 2 | ret = avcodec_open2(ctx, codec, NULL); | |
| 74 |
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2 | if (ret < 0) { |
| 75 | ✗ | fprintf(stderr, "avcodec_open2 failed: %d\n", ret); | |
| 76 | ✗ | avcodec_free_context(&ctx); | |
| 77 | ✗ | return 1; | |
| 78 | } | ||
| 79 | |||
| 80 | 2 | printf("%s bit_rate=%"PRId64" block_align=%d bits_per_coded_sample=%d frame_size=%d\n", | |
| 81 | 2 | codec->name, ctx->bit_rate, ctx->block_align, | |
| 82 | 2 | ctx->bits_per_coded_sample, ctx->frame_size); | |
| 83 | |||
| 84 | 2 | avcodec_free_context(&ctx); | |
| 85 | 2 | return 0; | |
| 86 | } | ||
| 87 |