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125 lines
3.3 KiB
125 lines
3.3 KiB
/*
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* Copyright © 2019 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors: Simon Ser <simon.ser@intel.com>
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*/
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#include "config.h"
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#include <string.h>
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#include "igt_core.h"
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#include "igt_infoframe.h"
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/**
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* SECTION:igt_infoframe
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* @short_description: InfoFrame parsing library
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* @title: InfoFrame
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* @include: igt_infoframe.h
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*
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* This library provides helpers to parse InfoFrames as defined in CEA-861-D
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* section 6.
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*/
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static const int sampling_freqs[] = {
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-1, /* refer to stream header */
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33000,
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44100,
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48000,
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88200,
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96000,
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176400,
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192000,
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};
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static const size_t sampling_freqs_len = sizeof(sampling_freqs) / sizeof(sampling_freqs[0]);
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static const int sample_sizes[] = {
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-1, /* refer to stream header */
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16,
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20,
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24,
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};
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static const size_t sample_sizes_len = sizeof(sample_sizes) / sizeof(sample_sizes[0]);
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bool infoframe_avi_parse(struct infoframe_avi *infoframe, int version,
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const uint8_t *buf, size_t buf_size)
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{
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memset(infoframe, 0, sizeof(*infoframe));
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switch (version) {
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case 2:
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case 3:
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case 4:
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break; /* supported */
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default:
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igt_debug("Unsuppported AVI InfoFrame version: %d\n", version);
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return false;
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}
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if (buf_size < 13)
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return false;
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infoframe->rgb_ycbcr = buf[0] >> 5;
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infoframe->scan = buf[0] & 0x3;
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infoframe->colorimetry = buf[1] >> 6;
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infoframe->picture_aspect_ratio = (buf[1] >> 4) & 0x3;
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infoframe->active_aspect_ratio = buf[1] & 0xF;
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infoframe->vic = buf[3];
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return true;
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}
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bool infoframe_audio_parse(struct infoframe_audio *infoframe, int version,
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const uint8_t *buf, size_t buf_size)
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{
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int channel_count;
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size_t sampling_freq_idx, sample_size_idx;
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memset(infoframe, 0, sizeof(*infoframe));
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if (version != 1 || buf_size < 5)
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return false;
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infoframe->coding_type = buf[0] >> 4;
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channel_count = buf[0] & 0x7;
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if (channel_count == 0)
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infoframe->channel_count = -1;
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else
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infoframe->channel_count = channel_count + 1;
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sampling_freq_idx = (buf[1] >> 2) & 0x7;
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if (sampling_freq_idx >= sampling_freqs_len)
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return false;
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infoframe->sampling_freq = sampling_freqs[sampling_freq_idx];
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sample_size_idx = buf[1] & 0x3;
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if (sample_size_idx >= sample_sizes_len)
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return false;
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infoframe->sample_size = sample_sizes[sample_size_idx];
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return true;
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}
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