/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: 2026-09-14 08:00

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	232k	{
57	232k	static const uint8_t bits_per_samples[4] = { 0, 16, 20, 24 };
58	232k	static const AVChannelLayout channel_layouts[16] = {
59	232k	{ 0 }, AV_CHANNEL_LAYOUT_MONO, { 0 },
60	232k	AV_CHANNEL_LAYOUT_STEREO, AV_CHANNEL_LAYOUT_SURROUND, AV_CHANNEL_LAYOUT_2_1,
61	232k	AV_CHANNEL_LAYOUT_4POINT0, AV_CHANNEL_LAYOUT_2_2, AV_CHANNEL_LAYOUT_5POINT0,
62	232k	AV_CHANNEL_LAYOUT_5POINT1, AV_CHANNEL_LAYOUT_7POINT0, AV_CHANNEL_LAYOUT_7POINT1,
63	232k	{ 0 }, { 0 }, { 0 }, { 0 },
64	232k	};
65	232k	uint8_t channel_layout = header[2] >> 4;
66
67	232k	if (avctx->debug & FF_DEBUG_PICT_INFO)
68	0	ff_dlog(avctx, "pcm_bluray_parse_header: header = %02x%02x%02x%02x\n",
69	232k	header[0], header[1], header[2], header[3]);
70
71		/* get the sample depth and derive the sample format from it */
72	232k	avctx->bits_per_coded_sample = bits_per_samples[header[3] >> 6];
73	232k	if (!(avctx->bits_per_coded_sample == 16 \|\| avctx->bits_per_coded_sample == 24)) {
74	2.14k	av_log(avctx, AV_LOG_ERROR, "unsupported sample depth (%d)\n", avctx->bits_per_coded_sample);
75	2.14k	return AVERROR_INVALIDDATA;
76	2.14k	}
77	230k	avctx->sample_fmt = avctx->bits_per_coded_sample == 16 ? AV_SAMPLE_FMT_S16
78	230k	: AV_SAMPLE_FMT_S32;
79	230k	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	230k	switch (header[2] & 0x0f) {
84	216k	case 1:
85	216k	avctx->sample_rate = 48000;
86	216k	break;
87	5.77k	case 4:
88	5.77k	avctx->sample_rate = 96000;
89	5.77k	break;
90	5.85k	case 5:
91	5.85k	avctx->sample_rate = 192000;
92	5.85k	break;
93	2.33k	default:
94	2.33k	avctx->sample_rate = 0;
95	2.33k	av_log(avctx, AV_LOG_ERROR, "reserved sample rate (%d)\n",
96	2.33k	header[2] & 0x0f);
97	2.33k	return AVERROR_INVALIDDATA;
98	230k	}
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	227k	av_channel_layout_uninit(&avctx->ch_layout);
107	227k	avctx->ch_layout = channel_layouts[channel_layout];
108	227k	if (!avctx->ch_layout.nb_channels) {
109	272	av_log(avctx, AV_LOG_ERROR, "reserved channel configuration (%d)\n",
110	272	channel_layout);
111	272	return AVERROR_INVALIDDATA;
112	272	}
113
114	227k	avctx->bit_rate = FFALIGN(avctx->ch_layout.nb_channels, 2) * avctx->sample_rate *
115	227k	avctx->bits_per_coded_sample;
116
117	227k	if (avctx->debug & FF_DEBUG_PICT_INFO)
118	0	ff_dlog(avctx,
119	227k	"pcm_bluray_parse_header: %d channels, %d bits per sample, %d Hz, %"PRId64" bit/s\n",
120	227k	avctx->ch_layout.nb_channels, avctx->bits_per_coded_sample,
121	227k	avctx->sample_rate, avctx->bit_rate);
122	227k	return 0;
123	227k	}
124
125		static int pcm_bluray_decode_frame(AVCodecContext avctx, AVFrame frame,
126		int got_frame_ptr, AVPacket avpkt)
127	370k	{
128	370k	const uint8_t *src = avpkt->data;
129	370k	int buf_size = avpkt->size;
130	370k	GetByteContext gb;
131	370k	int num_source_channels, channel, retval;
132	370k	int sample_size, samples;
133	370k	int16_t *dst16;
134	370k	int32_t *dst32;
135
136	370k	if (buf_size < 4) {
137	138k	av_log(avctx, AV_LOG_ERROR, "PCM packet too small\n");
138	138k	return AVERROR_INVALIDDATA;
139	138k	}
140
141	232k	if ((retval = pcm_bluray_parse_header(avctx, src)))
142	4.74k	return retval;
143	227k	src += 4;
144	227k	buf_size -= 4;
145
146	227k	bytestream2_init(&gb, src, buf_size);
147
148		/* There's always an even number of channels in the source */
149	227k	num_source_channels = FFALIGN(avctx->ch_layout.nb_channels, 2);
150	227k	sample_size = (num_source_channels *
151	227k	(avctx->sample_fmt == AV_SAMPLE_FMT_S16 ? 16 : 24)) >> 3;
152	227k	samples = buf_size / sample_size;
153
154		/* get output buffer */
155	227k	frame->nb_samples = samples;
156	227k	if ((retval = ff_get_buffer(avctx, frame, 0)) < 0)
157	8.91k	return retval;
158	218k	dst16 = (int16_t *)frame->data[0];
159	218k	dst32 = (int32_t *)frame->data[0];
160
161	218k	if (samples) {
162	218k	switch (avctx->ch_layout.u.mask) {
163		/* cases with same number of source and coded channels */
164	2.26k	case AV_CH_LAYOUT_STEREO:
165	2.78k	case AV_CH_LAYOUT_4POINT0:
166	3.16k	case AV_CH_LAYOUT_2_2:
167	3.16k	samples *= num_source_channels;
168	3.16k	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	1.72M	do {
173	1.72M	*dst16++ = bytestream2_get_be16u(&gb);
174	1.72M	} while (--samples);
175	2.81k	#endif
176	2.81k	} else {
177	4.68k	do {
178	4.68k	*dst32++ = bytestream2_get_be24u(&gb) << 8;
179	4.68k	} while (--samples);
180	349	}
181	3.16k	break;
182		/* cases where number of source channels = coded channels + 1 */
183	211k	case AV_CH_LAYOUT_MONO:
184	211k	case AV_CH_LAYOUT_SURROUND:
185	213k	case AV_CH_LAYOUT_2_1:
186	213k	case AV_CH_LAYOUT_5POINT0:
187	213k	if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
188	3.49M	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	3.49M	channel = avctx->ch_layout.nb_channels;
195	3.68M	do {
196	3.68M	*dst16++ = bytestream2_get_be16u(&gb);
197	3.68M	} while (--channel);
198	3.49M	#endif
199	3.49M	bytestream2_skip(&gb, 2);
200	3.49M	} while (--samples);
201	210k	} else {
202	476k	do {
203	476k	channel = avctx->ch_layout.nb_channels;
204	620k	do {
205	620k	*dst32++ = bytestream2_get_be24u(&gb) << 8;
206	620k	} while (--channel);
207	476k	bytestream2_skip(&gb, 3);
208	476k	} while (--samples);
209	3.15k	}
210	213k	break;
211		/* remapping: L, R, C, LBack, RBack, LF */
212	511	case AV_CH_LAYOUT_5POINT1:
213	511	if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
214	565	do {
215	565	dst16[0] = bytestream2_get_be16u(&gb);
216	565	dst16[1] = bytestream2_get_be16u(&gb);
217	565	dst16[2] = bytestream2_get_be16u(&gb);
218	565	dst16[4] = bytestream2_get_be16u(&gb);
219	565	dst16[5] = bytestream2_get_be16u(&gb);
220	565	dst16[3] = bytestream2_get_be16u(&gb);
221	565	dst16 += 6;
222	565	} while (--samples);
223	269	} else {
224	19.2k	do {
225	19.2k	dst32[0] = bytestream2_get_be24u(&gb) << 8;
226	19.2k	dst32[1] = bytestream2_get_be24u(&gb) << 8;
227	19.2k	dst32[2] = bytestream2_get_be24u(&gb) << 8;
228	19.2k	dst32[4] = bytestream2_get_be24u(&gb) << 8;
229	19.2k	dst32[5] = bytestream2_get_be24u(&gb) << 8;
230	19.2k	dst32[3] = bytestream2_get_be24u(&gb) << 8;
231	19.2k	dst32 += 6;
232	19.2k	} while (--samples);
233	242	}
234	511	break;
235		/* remapping: L, R, C, LSide, LBack, RBack, RSide, <unused> */
236	957	case AV_CH_LAYOUT_7POINT0:
237	957	if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
238	91.4k	do {
239	91.4k	dst16[0] = bytestream2_get_be16u(&gb);
240	91.4k	dst16[1] = bytestream2_get_be16u(&gb);
241	91.4k	dst16[2] = bytestream2_get_be16u(&gb);
242	91.4k	dst16[5] = bytestream2_get_be16u(&gb);
243	91.4k	dst16[3] = bytestream2_get_be16u(&gb);
244	91.4k	dst16[4] = bytestream2_get_be16u(&gb);
245	91.4k	dst16[6] = bytestream2_get_be16u(&gb);
246	91.4k	dst16 += 7;
247	91.4k	bytestream2_skip(&gb, 2);
248	91.4k	} while (--samples);
249	551	} else {
250	28.7k	do {
251	28.7k	dst32[0] = bytestream2_get_be24u(&gb) << 8;
252	28.7k	dst32[1] = bytestream2_get_be24u(&gb) << 8;
253	28.7k	dst32[2] = bytestream2_get_be24u(&gb) << 8;
254	28.7k	dst32[5] = bytestream2_get_be24u(&gb) << 8;
255	28.7k	dst32[3] = bytestream2_get_be24u(&gb) << 8;
256	28.7k	dst32[4] = bytestream2_get_be24u(&gb) << 8;
257	28.7k	dst32[6] = bytestream2_get_be24u(&gb) << 8;
258	28.7k	dst32 += 7;
259	28.7k	bytestream2_skip(&gb, 3);
260	28.7k	} while (--samples);
261	551	}
262	957	break;
263		/* remapping: L, R, C, LSide, LBack, RBack, RSide, LF */
264	488	case AV_CH_LAYOUT_7POINT1:
265	488	if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
266	1.39k	do {
267	1.39k	dst16[0] = bytestream2_get_be16u(&gb);
268	1.39k	dst16[1] = bytestream2_get_be16u(&gb);
269	1.39k	dst16[2] = bytestream2_get_be16u(&gb);
270	1.39k	dst16[6] = bytestream2_get_be16u(&gb);
271	1.39k	dst16[4] = bytestream2_get_be16u(&gb);
272	1.39k	dst16[5] = bytestream2_get_be16u(&gb);
273	1.39k	dst16[7] = bytestream2_get_be16u(&gb);
274	1.39k	dst16[3] = bytestream2_get_be16u(&gb);
275	1.39k	dst16 += 8;
276	1.39k	} while (--samples);
277	250	} else {
278	572	do {
279	572	dst32[0] = bytestream2_get_be24u(&gb) << 8;
280	572	dst32[1] = bytestream2_get_be24u(&gb) << 8;
281	572	dst32[2] = bytestream2_get_be24u(&gb) << 8;
282	572	dst32[6] = bytestream2_get_be24u(&gb) << 8;
283	572	dst32[4] = bytestream2_get_be24u(&gb) << 8;
284	572	dst32[5] = bytestream2_get_be24u(&gb) << 8;
285	572	dst32[7] = bytestream2_get_be24u(&gb) << 8;
286	572	dst32[3] = bytestream2_get_be24u(&gb) << 8;
287	572	dst32 += 8;
288	572	} while (--samples);
289	238	}
290	488	break;
291	218k	}
292	218k	}
293
294	218k	*got_frame_ptr = 1;
295
296	218k	retval = bytestream2_tell(&gb);
297	218k	if (avctx->debug & FF_DEBUG_BITSTREAM)
298	0	ff_dlog(avctx, "pcm_bluray_decode_frame: decoded %d -> %d bytes\n",
299	218k	retval, buf_size);
300	218k	return retval + 4;
301	218k	}
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		};