/src/ffmpeg/libavcodec/pcm-bluray.c

Source
/*
 * LPCM codecs for PCM format found in Blu-ray PCM streams
 * Copyright (c) 2009, 2013 Christian Schmidt
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * PCM codec for Blu-ray PCM audio tracks
 */

#include "libavutil/channel_layout.h"
#include "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "decode.h"

/*
 * Channel Mapping according to
 * Blu-ray Disc Read-Only Format Version 1
 * Part 3: Audio Visual Basic Specifications
 * mono     M1    X
 * stereo   L     R
 * 3/0      L     R    C    X
 * 2/1      L     R    S    X
 * 3/1      L     R    C    S
 * 2/2      L     R    LS   RS
 * 3/2      L     R    C    LS    RS    X
 * 3/2+lfe  L     R    C    LS    RS    lfe
 * 3/4      L     R    C    LS    Rls   Rrs  RS   X
 * 3/4+lfe  L     R    C    LS    Rls   Rrs  RS   lfe
 */

/**
 * Parse the header of a LPCM frame read from a Blu-ray MPEG-TS stream
 * @param avctx the codec context
 * @param header pointer to the first four bytes of the data packet
 */
static int pcm_bluray_parse_header(AVCodecContext *avctx,
                                   const uint8_t *header)
{
    static const uint8_t bits_per_samples[4] = { 0, 16, 20, 24 };
    static const AVChannelLayout channel_layouts[16] = {
        { 0 },                     AV_CHANNEL_LAYOUT_MONO,     { 0 },
        AV_CHANNEL_LAYOUT_STEREO,  AV_CHANNEL_LAYOUT_SURROUND, AV_CHANNEL_LAYOUT_2_1,
        AV_CHANNEL_LAYOUT_4POINT0, AV_CHANNEL_LAYOUT_2_2,      AV_CHANNEL_LAYOUT_5POINT0,
        AV_CHANNEL_LAYOUT_5POINT1, AV_CHANNEL_LAYOUT_7POINT0,  AV_CHANNEL_LAYOUT_7POINT1,
        { 0 }, { 0 }, { 0 }, { 0 },
    };
    uint8_t channel_layout = header[2] >> 4;

    if (avctx->debug & FF_DEBUG_PICT_INFO)
        ff_dlog(avctx, "pcm_bluray_parse_header: header = %02x%02x%02x%02x\n",
                header[0], header[1], header[2], header[3]);

    /* get the sample depth and derive the sample format from it */
    avctx->bits_per_coded_sample = bits_per_samples[header[3] >> 6];
    if (!(avctx->bits_per_coded_sample == 16 || avctx->bits_per_coded_sample == 24)) {
        av_log(avctx, AV_LOG_ERROR, "unsupported sample depth (%d)\n", avctx->bits_per_coded_sample);
        return AVERROR_INVALIDDATA;
    }
    avctx->sample_fmt = avctx->bits_per_coded_sample == 16 ? AV_SAMPLE_FMT_S16
                                                           : AV_SAMPLE_FMT_S32;
    if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
        avctx->bits_per_raw_sample = avctx->bits_per_coded_sample;

    /* get the sample rate. Not all values are used. */
    switch (header[2] & 0x0f) {
    case 1:
        avctx->sample_rate = 48000;
        break;
    case 4:
        avctx->sample_rate = 96000;
        break;
    case 5:
        avctx->sample_rate = 192000;
        break;
    default:
        avctx->sample_rate = 0;
        av_log(avctx, AV_LOG_ERROR, "reserved sample rate (%d)\n",
               header[2] & 0x0f);
        return AVERROR_INVALIDDATA;
    }

    /*
     * get the channel number (and mapping). Not all values are used.
     * It must be noted that the number of channels in the MPEG stream can
     * differ from the actual meaningful number, e.g. mono audio still has two
     * channels, one being empty.
     */
    av_channel_layout_uninit(&avctx->ch_layout);
    avctx->ch_layout = channel_layouts[channel_layout];
    if (!avctx->ch_layout.nb_channels) {
        av_log(avctx, AV_LOG_ERROR, "reserved channel configuration (%d)\n",
               channel_layout);
        return AVERROR_INVALIDDATA;
    }

    avctx->bit_rate = FFALIGN(avctx->ch_layout.nb_channels, 2) * avctx->sample_rate *
                      avctx->bits_per_coded_sample;

    if (avctx->debug & FF_DEBUG_PICT_INFO)
        ff_dlog(avctx,
                "pcm_bluray_parse_header: %d channels, %d bits per sample, %d Hz, %"PRId64" bit/s\n",
                avctx->ch_layout.nb_channels, avctx->bits_per_coded_sample,
                avctx->sample_rate, avctx->bit_rate);
    return 0;
}

static int pcm_bluray_decode_frame(AVCodecContext *avctx, AVFrame *frame,
                                   int *got_frame_ptr, AVPacket *avpkt)
{
    const uint8_t *src = avpkt->data;
    int buf_size = avpkt->size;
    GetByteContext gb;
    int num_source_channels, channel, retval;
    int sample_size, samples;
    int16_t *dst16;
    int32_t *dst32;

    if (buf_size < 4) {
        av_log(avctx, AV_LOG_ERROR, "PCM packet too small\n");
        return AVERROR_INVALIDDATA;
    }

    if ((retval = pcm_bluray_parse_header(avctx, src)))
        return retval;
    src += 4;
    buf_size -= 4;

    bytestream2_init(&gb, src, buf_size);

    /* There's always an even number of channels in the source */
    num_source_channels = FFALIGN(avctx->ch_layout.nb_channels, 2);
    sample_size = (num_source_channels *
                   (avctx->sample_fmt == AV_SAMPLE_FMT_S16 ? 16 : 24)) >> 3;
    samples = buf_size / sample_size;

    /* get output buffer */
    frame->nb_samples = samples;
    if ((retval = ff_get_buffer(avctx, frame, 0)) < 0)
        return retval;
    dst16 = (int16_t *)frame->data[0];
    dst32 = (int32_t *)frame->data[0];

    if (samples) {
        switch (avctx->ch_layout.u.mask) {
            /* cases with same number of source and coded channels */
        case AV_CH_LAYOUT_STEREO:
        case AV_CH_LAYOUT_4POINT0:
        case AV_CH_LAYOUT_2_2:
            samples *= num_source_channels;
            if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
#if HAVE_BIGENDIAN
                bytestream2_get_buffer(&gb, (uint8_t*)dst16, buf_size);
#else
                do {
                    *dst16++ = bytestream2_get_be16u(&gb);
                } while (--samples);
#endif
            } else {
                do {
                    *dst32++ = bytestream2_get_be24u(&gb) << 8;
                } while (--samples);
            }
            break;
        /* cases where number of source channels = coded channels + 1 */
        case AV_CH_LAYOUT_MONO:
        case AV_CH_LAYOUT_SURROUND:
        case AV_CH_LAYOUT_2_1:
        case AV_CH_LAYOUT_5POINT0:
            if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
                do {
#if HAVE_BIGENDIAN
                    bytestream2_get_buffer(&gb, (uint8_t*)dst16,
                                           avctx->ch_layout.nb_channels * 2);
                    dst16 += avctx->ch_layout.nb_channels;
#else
                    channel = avctx->ch_layout.nb_channels;
                    do {
                        *dst16++ = bytestream2_get_be16u(&gb);
                    } while (--channel);
#endif
                    bytestream2_skip(&gb, 2);
                } while (--samples);
            } else {
                do {
                    channel = avctx->ch_layout.nb_channels;
                    do {
                        *dst32++ = bytestream2_get_be24u(&gb) << 8;
                    } while (--channel);
                    bytestream2_skip(&gb, 3);
                } while (--samples);
            }
            break;
            /* remapping: L, R, C, LBack, RBack, LF */
        case AV_CH_LAYOUT_5POINT1:
            if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
                do {
                    dst16[0] = bytestream2_get_be16u(&gb);
                    dst16[1] = bytestream2_get_be16u(&gb);
                    dst16[2] = bytestream2_get_be16u(&gb);
                    dst16[4] = bytestream2_get_be16u(&gb);
                    dst16[5] = bytestream2_get_be16u(&gb);
                    dst16[3] = bytestream2_get_be16u(&gb);
                    dst16 += 6;
                } while (--samples);
            } else {
                do {
                    dst32[0] = bytestream2_get_be24u(&gb) << 8;
                    dst32[1] = bytestream2_get_be24u(&gb) << 8;
                    dst32[2] = bytestream2_get_be24u(&gb) << 8;
                    dst32[4] = bytestream2_get_be24u(&gb) << 8;
                    dst32[5] = bytestream2_get_be24u(&gb) << 8;
                    dst32[3] = bytestream2_get_be24u(&gb) << 8;
                    dst32 += 6;
                } while (--samples);
            }
            break;
            /* remapping: L, R, C, LSide, LBack, RBack, RSide, <unused> */
        case AV_CH_LAYOUT_7POINT0:
            if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
                do {
                    dst16[0] = bytestream2_get_be16u(&gb);
                    dst16[1] = bytestream2_get_be16u(&gb);
                    dst16[2] = bytestream2_get_be16u(&gb);
                    dst16[5] = bytestream2_get_be16u(&gb);
                    dst16[3] = bytestream2_get_be16u(&gb);
                    dst16[4] = bytestream2_get_be16u(&gb);
                    dst16[6] = bytestream2_get_be16u(&gb);
                    dst16 += 7;
                    bytestream2_skip(&gb, 2);
                } while (--samples);
            } else {
                do {
                    dst32[0] = bytestream2_get_be24u(&gb) << 8;
                    dst32[1] = bytestream2_get_be24u(&gb) << 8;
                    dst32[2] = bytestream2_get_be24u(&gb) << 8;
                    dst32[5] = bytestream2_get_be24u(&gb) << 8;
                    dst32[3] = bytestream2_get_be24u(&gb) << 8;
                    dst32[4] = bytestream2_get_be24u(&gb) << 8;
                    dst32[6] = bytestream2_get_be24u(&gb) << 8;
                    dst32 += 7;
                    bytestream2_skip(&gb, 3);
                } while (--samples);
            }
            break;
            /* remapping: L, R, C, LSide, LBack, RBack, RSide, LF */
        case AV_CH_LAYOUT_7POINT1:
            if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
                do {
                    dst16[0] = bytestream2_get_be16u(&gb);
                    dst16[1] = bytestream2_get_be16u(&gb);
                    dst16[2] = bytestream2_get_be16u(&gb);
                    dst16[6] = bytestream2_get_be16u(&gb);
                    dst16[4] = bytestream2_get_be16u(&gb);
                    dst16[5] = bytestream2_get_be16u(&gb);
                    dst16[7] = bytestream2_get_be16u(&gb);
                    dst16[3] = bytestream2_get_be16u(&gb);
                    dst16 += 8;
                } while (--samples);
            } else {
                do {
                    dst32[0] = bytestream2_get_be24u(&gb) << 8;
                    dst32[1] = bytestream2_get_be24u(&gb) << 8;
                    dst32[2] = bytestream2_get_be24u(&gb) << 8;
                    dst32[6] = bytestream2_get_be24u(&gb) << 8;
                    dst32[4] = bytestream2_get_be24u(&gb) << 8;
                    dst32[5] = bytestream2_get_be24u(&gb) << 8;
                    dst32[7] = bytestream2_get_be24u(&gb) << 8;
                    dst32[3] = bytestream2_get_be24u(&gb) << 8;
                    dst32 += 8;
                } while (--samples);
            }
            break;
        }
    }

    *got_frame_ptr = 1;

    retval = bytestream2_tell(&gb);
    if (avctx->debug & FF_DEBUG_BITSTREAM)
        ff_dlog(avctx, "pcm_bluray_decode_frame: decoded %d -> %d bytes\n",
                retval, buf_size);
    return retval + 4;
}

const FFCodec ff_pcm_bluray_decoder = {
    .p.name         = "pcm_bluray",
    CODEC_LONG_NAME("PCM signed 16|20|24-bit big-endian for Blu-ray media"),
    .p.type         = AVMEDIA_TYPE_AUDIO,
    .p.id           = AV_CODEC_ID_PCM_BLURAY,
    FF_CODEC_DECODE_CB(pcm_bluray_decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
};

Coverage Report

Created: 2026-02-14 06:59

Line	Count	Source
1		/*
2		* LPCM codecs for PCM format found in Blu-ray PCM streams
3		* Copyright (c) 2009, 2013 Christian Schmidt
4		*
5		* This file is part of FFmpeg.
6		*
7		* FFmpeg is free software; you can redistribute it and/or
8		* modify it under the terms of the GNU Lesser General Public
9		* License as published by the Free Software Foundation; either
10		* version 2.1 of the License, or (at your option) any later version.
11		*
12		* FFmpeg is distributed in the hope that it will be useful,
13		* but WITHOUT ANY WARRANTY; without even the implied warranty of
14		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15		* Lesser General Public License for more details.
16		*
17		* You should have received a copy of the GNU Lesser General Public
18		* License along with FFmpeg; if not, write to the Free Software
19		* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20		*/
21
22		/**
23		* @file
24		* PCM codec for Blu-ray PCM audio tracks
25		*/
26
27		#include "libavutil/channel_layout.h"
28		#include "avcodec.h"
29		#include "bytestream.h"
30		#include "codec_internal.h"
31		#include "decode.h"
32
33		/*
34		* Channel Mapping according to
35		* Blu-ray Disc Read-Only Format Version 1
36		* Part 3: Audio Visual Basic Specifications
37		* mono M1 X
38		* stereo L R
39		* 3/0 L R C X
40		* 2/1 L R S X
41		* 3/1 L R C S
42		* 2/2 L R LS RS
43		* 3/2 L R C LS RS X
44		* 3/2+lfe L R C LS RS lfe
45		* 3/4 L R C LS Rls Rrs RS X
46		* 3/4+lfe L R C LS Rls Rrs RS lfe
47		*/
48
49		/**
50		* Parse the header of a LPCM frame read from a Blu-ray MPEG-TS stream
51		* @param avctx the codec context
52		* @param header pointer to the first four bytes of the data packet
53		*/
54		static int pcm_bluray_parse_header(AVCodecContext *avctx,
55		const uint8_t *header)
56	219k	{
57	219k	static const uint8_t bits_per_samples[4] = { 0, 16, 20, 24 };
58	219k	static const AVChannelLayout channel_layouts[16] = {
59	219k	{ 0 }, AV_CHANNEL_LAYOUT_MONO, { 0 },
60	219k	AV_CHANNEL_LAYOUT_STEREO, AV_CHANNEL_LAYOUT_SURROUND, AV_CHANNEL_LAYOUT_2_1,
61	219k	AV_CHANNEL_LAYOUT_4POINT0, AV_CHANNEL_LAYOUT_2_2, AV_CHANNEL_LAYOUT_5POINT0,
62	219k	AV_CHANNEL_LAYOUT_5POINT1, AV_CHANNEL_LAYOUT_7POINT0, AV_CHANNEL_LAYOUT_7POINT1,
63	219k	{ 0 }, { 0 }, { 0 }, { 0 },
64	219k	};
65	219k	uint8_t channel_layout = header[2] >> 4;
66
67	219k	if (avctx->debug & FF_DEBUG_PICT_INFO)
68	0	ff_dlog(avctx, "pcm_bluray_parse_header: header = %02x%02x%02x%02x\n",
69	219k	header[0], header[1], header[2], header[3]);
70
71		/* get the sample depth and derive the sample format from it */
72	219k	avctx->bits_per_coded_sample = bits_per_samples[header[3] >> 6];
73	219k	if (!(avctx->bits_per_coded_sample == 16 \|\| avctx->bits_per_coded_sample == 24)) {
74	1.96k	av_log(avctx, AV_LOG_ERROR, "unsupported sample depth (%d)\n", avctx->bits_per_coded_sample);
75	1.96k	return AVERROR_INVALIDDATA;
76	1.96k	}
77	217k	avctx->sample_fmt = avctx->bits_per_coded_sample == 16 ? AV_SAMPLE_FMT_S16
78	217k	: AV_SAMPLE_FMT_S32;
79	217k	if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
80	10.9k	avctx->bits_per_raw_sample = avctx->bits_per_coded_sample;
81
82		/* get the sample rate. Not all values are used. */
83	217k	switch (header[2] & 0x0f) {
84	205k	case 1:
85	205k	avctx->sample_rate = 48000;
86	205k	break;
87	4.36k	case 4:
88	4.36k	avctx->sample_rate = 96000;
89	4.36k	break;
90	5.45k	case 5:
91	5.45k	avctx->sample_rate = 192000;
92	5.45k	break;
93	2.52k	default:
94	2.52k	avctx->sample_rate = 0;
95	2.52k	av_log(avctx, AV_LOG_ERROR, "reserved sample rate (%d)\n",
96	2.52k	header[2] & 0x0f);
97	2.52k	return AVERROR_INVALIDDATA;
98	217k	}
99
100		/*
101		* get the channel number (and mapping). Not all values are used.
102		* It must be noted that the number of channels in the MPEG stream can
103		* differ from the actual meaningful number, e.g. mono audio still has two
104		* channels, one being empty.
105		*/
106	214k	av_channel_layout_uninit(&avctx->ch_layout);
107	214k	avctx->ch_layout = channel_layouts[channel_layout];
108	214k	if (!avctx->ch_layout.nb_channels) {
109	259	av_log(avctx, AV_LOG_ERROR, "reserved channel configuration (%d)\n",
110	259	channel_layout);
111	259	return AVERROR_INVALIDDATA;
112	259	}
113
114	214k	avctx->bit_rate = FFALIGN(avctx->ch_layout.nb_channels, 2) * avctx->sample_rate *
115	214k	avctx->bits_per_coded_sample;
116
117	214k	if (avctx->debug & FF_DEBUG_PICT_INFO)
118	0	ff_dlog(avctx,
119	214k	"pcm_bluray_parse_header: %d channels, %d bits per sample, %d Hz, %"PRId64" bit/s\n",
120	214k	avctx->ch_layout.nb_channels, avctx->bits_per_coded_sample,
121	214k	avctx->sample_rate, avctx->bit_rate);
122	214k	return 0;
123	214k	}
124
125		static int pcm_bluray_decode_frame(AVCodecContext avctx, AVFrame frame,
126		int got_frame_ptr, AVPacket avpkt)
127	354k	{
128	354k	const uint8_t *src = avpkt->data;
129	354k	int buf_size = avpkt->size;
130	354k	GetByteContext gb;
131	354k	int num_source_channels, channel, retval;
132	354k	int sample_size, samples;
133	354k	int16_t *dst16;
134	354k	int32_t *dst32;
135
136	354k	if (buf_size < 4) {
137	135k	av_log(avctx, AV_LOG_ERROR, "PCM packet too small\n");
138	135k	return AVERROR_INVALIDDATA;
139	135k	}
140
141	219k	if ((retval = pcm_bluray_parse_header(avctx, src)))
142	4.75k	return retval;
143	214k	src += 4;
144	214k	buf_size -= 4;
145
146	214k	bytestream2_init(&gb, src, buf_size);
147
148		/* There's always an even number of channels in the source */
149	214k	num_source_channels = FFALIGN(avctx->ch_layout.nb_channels, 2);
150	214k	sample_size = (num_source_channels *
151	214k	(avctx->sample_fmt == AV_SAMPLE_FMT_S16 ? 16 : 24)) >> 3;
152	214k	samples = buf_size / sample_size;
153
154		/* get output buffer */
155	214k	frame->nb_samples = samples;
156	214k	if ((retval = ff_get_buffer(avctx, frame, 0)) < 0)
157	7.43k	return retval;
158	207k	dst16 = (int16_t *)frame->data[0];
159	207k	dst32 = (int32_t *)frame->data[0];
160
161	207k	if (samples) {
162	207k	switch (avctx->ch_layout.u.mask) {
163		/* cases with same number of source and coded channels */
164	2.10k	case AV_CH_LAYOUT_STEREO:
165	2.52k	case AV_CH_LAYOUT_4POINT0:
166	2.86k	case AV_CH_LAYOUT_2_2:
167	2.86k	samples *= num_source_channels;
168	2.86k	if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
169		#if HAVE_BIGENDIAN
170		bytestream2_get_buffer(&gb, (uint8_t*)dst16, buf_size);
171		#else
172	760k	do {
173	760k	*dst16++ = bytestream2_get_be16u(&gb);
174	760k	} while (--samples);
175	2.58k	#endif
176	2.58k	} else {
177	4.91k	do {
178	4.91k	*dst32++ = bytestream2_get_be24u(&gb) << 8;
179	4.91k	} while (--samples);
180	278	}
181	2.86k	break;
182		/* cases where number of source channels = coded channels + 1 */
183	200k	case AV_CH_LAYOUT_MONO:
184	200k	case AV_CH_LAYOUT_SURROUND:
185	202k	case AV_CH_LAYOUT_2_1:
186	202k	case AV_CH_LAYOUT_5POINT0:
187	202k	if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
188	3.42M	do {
189		#if HAVE_BIGENDIAN
190		bytestream2_get_buffer(&gb, (uint8_t*)dst16,
191		avctx->ch_layout.nb_channels * 2);
192		dst16 += avctx->ch_layout.nb_channels;
193		#else
194	3.42M	channel = avctx->ch_layout.nb_channels;
195	3.50M	do {
196	3.50M	*dst16++ = bytestream2_get_be16u(&gb);
197	3.50M	} while (--channel);
198	3.42M	#endif
199	3.42M	bytestream2_skip(&gb, 2);
200	3.42M	} while (--samples);
201	198k	} else {
202	578k	do {
203	578k	channel = avctx->ch_layout.nb_channels;
204	610k	do {
205	610k	*dst32++ = bytestream2_get_be24u(&gb) << 8;
206	610k	} while (--channel);
207	578k	bytestream2_skip(&gb, 3);
208	578k	} while (--samples);
209	4.03k	}
210	202k	break;
211		/* remapping: L, R, C, LBack, RBack, LF */
212	497	case AV_CH_LAYOUT_5POINT1:
213	497	if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
214	11.3k	do {
215	11.3k	dst16[0] = bytestream2_get_be16u(&gb);
216	11.3k	dst16[1] = bytestream2_get_be16u(&gb);
217	11.3k	dst16[2] = bytestream2_get_be16u(&gb);
218	11.3k	dst16[4] = bytestream2_get_be16u(&gb);
219	11.3k	dst16[5] = bytestream2_get_be16u(&gb);
220	11.3k	dst16[3] = bytestream2_get_be16u(&gb);
221	11.3k	dst16 += 6;
222	11.3k	} while (--samples);
223	255	} else {
224	1.08k	do {
225	1.08k	dst32[0] = bytestream2_get_be24u(&gb) << 8;
226	1.08k	dst32[1] = bytestream2_get_be24u(&gb) << 8;
227	1.08k	dst32[2] = bytestream2_get_be24u(&gb) << 8;
228	1.08k	dst32[4] = bytestream2_get_be24u(&gb) << 8;
229	1.08k	dst32[5] = bytestream2_get_be24u(&gb) << 8;
230	1.08k	dst32[3] = bytestream2_get_be24u(&gb) << 8;
231	1.08k	dst32 += 6;
232	1.08k	} while (--samples);
233	255	}
234	497	break;
235		/* remapping: L, R, C, LSide, LBack, RBack, RSide, <unused> */
236	896	case AV_CH_LAYOUT_7POINT0:
237	896	if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
238	114k	do {
239	114k	dst16[0] = bytestream2_get_be16u(&gb);
240	114k	dst16[1] = bytestream2_get_be16u(&gb);
241	114k	dst16[2] = bytestream2_get_be16u(&gb);
242	114k	dst16[5] = bytestream2_get_be16u(&gb);
243	114k	dst16[3] = bytestream2_get_be16u(&gb);
244	114k	dst16[4] = bytestream2_get_be16u(&gb);
245	114k	dst16[6] = bytestream2_get_be16u(&gb);
246	114k	dst16 += 7;
247	114k	bytestream2_skip(&gb, 2);
248	114k	} while (--samples);
249	498	} else {
250	44.8k	do {
251	44.8k	dst32[0] = bytestream2_get_be24u(&gb) << 8;
252	44.8k	dst32[1] = bytestream2_get_be24u(&gb) << 8;
253	44.8k	dst32[2] = bytestream2_get_be24u(&gb) << 8;
254	44.8k	dst32[5] = bytestream2_get_be24u(&gb) << 8;
255	44.8k	dst32[3] = bytestream2_get_be24u(&gb) << 8;
256	44.8k	dst32[4] = bytestream2_get_be24u(&gb) << 8;
257	44.8k	dst32[6] = bytestream2_get_be24u(&gb) << 8;
258	44.8k	dst32 += 7;
259	44.8k	bytestream2_skip(&gb, 3);
260	44.8k	} while (--samples);
261	398	}
262	896	break;
263		/* remapping: L, R, C, LSide, LBack, RBack, RSide, LF */
264	516	case AV_CH_LAYOUT_7POINT1:
265	516	if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
266	1.93k	do {
267	1.93k	dst16[0] = bytestream2_get_be16u(&gb);
268	1.93k	dst16[1] = bytestream2_get_be16u(&gb);
269	1.93k	dst16[2] = bytestream2_get_be16u(&gb);
270	1.93k	dst16[6] = bytestream2_get_be16u(&gb);
271	1.93k	dst16[4] = bytestream2_get_be16u(&gb);
272	1.93k	dst16[5] = bytestream2_get_be16u(&gb);
273	1.93k	dst16[7] = bytestream2_get_be16u(&gb);
274	1.93k	dst16[3] = bytestream2_get_be16u(&gb);
275	1.93k	dst16 += 8;
276	1.93k	} while (--samples);
277	281	} else {
278	499	do {
279	499	dst32[0] = bytestream2_get_be24u(&gb) << 8;
280	499	dst32[1] = bytestream2_get_be24u(&gb) << 8;
281	499	dst32[2] = bytestream2_get_be24u(&gb) << 8;
282	499	dst32[6] = bytestream2_get_be24u(&gb) << 8;
283	499	dst32[4] = bytestream2_get_be24u(&gb) << 8;
284	499	dst32[5] = bytestream2_get_be24u(&gb) << 8;
285	499	dst32[7] = bytestream2_get_be24u(&gb) << 8;
286	499	dst32[3] = bytestream2_get_be24u(&gb) << 8;
287	499	dst32 += 8;
288	499	} while (--samples);
289	235	}
290	516	break;
291	207k	}
292	207k	}
293
294	207k	*got_frame_ptr = 1;
295
296	207k	retval = bytestream2_tell(&gb);
297	207k	if (avctx->debug & FF_DEBUG_BITSTREAM)
298	0	ff_dlog(avctx, "pcm_bluray_decode_frame: decoded %d -> %d bytes\n",
299	207k	retval, buf_size);
300	207k	return retval + 4;
301	207k	}
302
303		const FFCodec ff_pcm_bluray_decoder = {
304		.p.name = "pcm_bluray",
305		CODEC_LONG_NAME("PCM signed 16\|20\|24-bit big-endian for Blu-ray media"),
306		.p.type = AVMEDIA_TYPE_AUDIO,
307		.p.id = AV_CODEC_ID_PCM_BLURAY,
308		FF_CODEC_DECODE_CB(pcm_bluray_decode_frame),
309		.p.capabilities = AV_CODEC_CAP_DR1 \| AV_CODEC_CAP_CHANNEL_CONF,
310		};