[deb_ffmpeg.git] / ffmpeg / libavcodec / pcm-bluray.c

/*
 * 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 "internal.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 uint32_t channel_layouts[16] = {
        0, AV_CH_LAYOUT_MONO, 0, AV_CH_LAYOUT_STEREO, AV_CH_LAYOUT_SURROUND,
        AV_CH_LAYOUT_2_1, AV_CH_LAYOUT_4POINT0, AV_CH_LAYOUT_2_2,
        AV_CH_LAYOUT_5POINT0, AV_CH_LAYOUT_5POINT1, AV_CH_LAYOUT_7POINT0,
        AV_CH_LAYOUT_7POINT1, 0, 0, 0, 0
    };
    static const uint8_t channels[16] = {
        0, 1, 0, 2, 3, 3, 4, 4, 5, 6, 7, 8, 0, 0, 0, 0
    };
    uint8_t channel_layout = header[2] >> 4;

    if (avctx->debug & FF_DEBUG_PICT_INFO)
        av_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.
     */
    avctx->channel_layout  = channel_layouts[channel_layout];
    avctx->channels        =        channels[channel_layout];
    if (!avctx->channels) {
        av_log(avctx, AV_LOG_ERROR, "reserved channel configuration (%d)\n",
               channel_layout);
        return AVERROR_INVALIDDATA;
    }

    avctx->bit_rate = FFALIGN(avctx->channels, 2) * avctx->sample_rate *
                      avctx->bits_per_coded_sample;

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

static int pcm_bluray_decode_frame(AVCodecContext *avctx, void *data,
                                   int *got_frame_ptr, AVPacket *avpkt)
{
    AVFrame *frame     = data;
    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->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->channel_layout) {
            /* 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, 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, dst16, avctx->channels * 2);
                    dst16 += avctx->channels;
#else
                    channel = avctx->channels;
                    do {
                        *dst16++ = bytestream2_get_be16u(&gb);
                    } while (--channel);
#endif
                    bytestream2_skip(&gb, 2);
                } while (--samples);
            } else {
                do {
                    channel = avctx->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)
        av_dlog(avctx, "pcm_bluray_decode_frame: decoded %d -> %d bytes\n",
                retval, buf_size);
    return retval + 4;
}

AVCodec ff_pcm_bluray_decoder = {
    .name           = "pcm_bluray",
    .long_name      = NULL_IF_CONFIG_SMALL("PCM signed 16|20|24-bit big-endian for Blu-ray media"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_PCM_BLURAY,
    .decode         = pcm_bluray_decode_frame,
    .capabilities   = CODEC_CAP_DR1,
    .sample_fmts    = (const enum AVSampleFormat[]){
        AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_NONE
    },
};
Commit	Line	Data
2ba45a60 DM	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 "internal.h"
	31
	32	/*
	33	* Channel Mapping according to
	34	* Blu-ray Disc Read-Only Format Version 1
	35	* Part 3: Audio Visual Basic Specifications
	36	* mono M1 X
	37	* stereo L R
	38	* 3/0 L R C X
	39	* 2/1 L R S X
	40	* 3/1 L R C S
	41	* 2/2 L R LS RS
	42	* 3/2 L R C LS RS X
	43	* 3/2+lfe L R C LS RS lfe
	44	* 3/4 L R C LS Rls Rrs RS X
	45	* 3/4+lfe L R C LS Rls Rrs RS lfe
	46	*/
	47
	48	/**
	49	* Parse the header of a LPCM frame read from a Blu-ray MPEG-TS stream
	50	* @param avctx the codec context
	51	* @param header pointer to the first four bytes of the data packet
	52	*/
	53	static int pcm_bluray_parse_header(AVCodecContext *avctx,
	54	const uint8_t *header)
	55	{
	56	static const uint8_t bits_per_samples[4] = { 0, 16, 20, 24 };
	57	static const uint32_t channel_layouts[16] = {
	58	0, AV_CH_LAYOUT_MONO, 0, AV_CH_LAYOUT_STEREO, AV_CH_LAYOUT_SURROUND,
	59	AV_CH_LAYOUT_2_1, AV_CH_LAYOUT_4POINT0, AV_CH_LAYOUT_2_2,
	60	AV_CH_LAYOUT_5POINT0, AV_CH_LAYOUT_5POINT1, AV_CH_LAYOUT_7POINT0,
	61	AV_CH_LAYOUT_7POINT1, 0, 0, 0, 0
	62	};
	63	static const uint8_t channels[16] = {
	64	0, 1, 0, 2, 3, 3, 4, 4, 5, 6, 7, 8, 0, 0, 0, 0
65	};
66	uint8_t channel_layout = header[2] >> 4;
67
68	if (avctx->debug & FF_DEBUG_PICT_INFO)
69	av_dlog(avctx, "pcm_bluray_parse_header: header = %02x%02x%02x%02x\n",
70	header[0], header[1], header[2], header[3]);
71
72	/* get the sample depth and derive the sample format from it */
73	avctx->bits_per_coded_sample = bits_per_samples[header[3] >> 6];
74	if (!(avctx->bits_per_coded_sample == 16 \|\| avctx->bits_per_coded_sample == 24)) {
75	av_log(avctx, AV_LOG_ERROR, "unsupported sample depth (%d)\n", avctx->bits_per_coded_sample);
76	return AVERROR_INVALIDDATA;
77	}
78	avctx->sample_fmt = avctx->bits_per_coded_sample == 16 ? AV_SAMPLE_FMT_S16
79	: AV_SAMPLE_FMT_S32;
80	if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
81	avctx->bits_per_raw_sample = avctx->bits_per_coded_sample;
82
83	/* get the sample rate. Not all values are used. */
84	switch (header[2] & 0x0f) {
85	case 1:
86	avctx->sample_rate = 48000;
87	break;
88	case 4:
89	avctx->sample_rate = 96000;
90	break;
91	case 5:
92	avctx->sample_rate = 192000;
93	break;
94	default:
95	avctx->sample_rate = 0;
96	av_log(avctx, AV_LOG_ERROR, "reserved sample rate (%d)\n",
97	header[2] & 0x0f);
98	return AVERROR_INVALIDDATA;
99	}
100
101	/*
102	* get the channel number (and mapping). Not all values are used.
103	* It must be noted that the number of channels in the MPEG stream can
104	* differ from the actual meaningful number, e.g. mono audio still has two
105	* channels, one being empty.
106	*/
107	avctx->channel_layout = channel_layouts[channel_layout];
108	avctx->channels = channels[channel_layout];
109	if (!avctx->channels) {
110	av_log(avctx, AV_LOG_ERROR, "reserved channel configuration (%d)\n",
111	channel_layout);
112	return AVERROR_INVALIDDATA;
113	}
114
115	avctx->bit_rate = FFALIGN(avctx->channels, 2) * avctx->sample_rate *
116	avctx->bits_per_coded_sample;
117
118	if (avctx->debug & FF_DEBUG_PICT_INFO)
119	av_dlog(avctx,
120	"pcm_bluray_parse_header: %d channels, %d bits per sample, %d Hz, %d bit/s\n",
121	avctx->channels, avctx->bits_per_coded_sample,
122	avctx->sample_rate, avctx->bit_rate);
123	return 0;
124	}
125
126	static int pcm_bluray_decode_frame(AVCodecContext avctx, void data,
127	int got_frame_ptr, AVPacket avpkt)
128	{
129	AVFrame *frame = data;
130	const uint8_t *src = avpkt->data;
131	int buf_size = avpkt->size;
132	GetByteContext gb;
133	int num_source_channels, channel, retval;
134	int sample_size, samples;
135	int16_t *dst16;
136	int32_t *dst32;
137
138	if (buf_size < 4) {
139	av_log(avctx, AV_LOG_ERROR, "PCM packet too small\n");
140	return AVERROR_INVALIDDATA;
141	}
142
143	if ((retval = pcm_bluray_parse_header(avctx, src)))
144	return retval;
145	src += 4;
146	buf_size -= 4;
147
148	bytestream2_init(&gb, src, buf_size);
149
150	/* There's always an even number of channels in the source */
151	num_source_channels = FFALIGN(avctx->channels, 2);
152	sample_size = (num_source_channels *
153	(avctx->sample_fmt == AV_SAMPLE_FMT_S16 ? 16 : 24)) >> 3;
154	samples = buf_size / sample_size;
155
156	/* get output buffer */
157	frame->nb_samples = samples;
158	if ((retval = ff_get_buffer(avctx, frame, 0)) < 0)
159	return retval;
160	dst16 = (int16_t *)frame->data[0];
161	dst32 = (int32_t *)frame->data[0];
162
163	if (samples) {
164	switch (avctx->channel_layout) {
165	/* cases with same number of source and coded channels */
166	case AV_CH_LAYOUT_STEREO:
167	case AV_CH_LAYOUT_4POINT0:
168	case AV_CH_LAYOUT_2_2:
169	samples *= num_source_channels;
170	if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
171	#if HAVE_BIGENDIAN
172	bytestream2_get_buffer(&gb, dst16, buf_size);
173	#else
174	do {
175	*dst16++ = bytestream2_get_be16u(&gb);
176	} while (--samples);
177	#endif
178	} else {
179	do {
180	*dst32++ = bytestream2_get_be24u(&gb) << 8;
181	} while (--samples);
182	}
183	break;
184	/* cases where number of source channels = coded channels + 1 */
185	case AV_CH_LAYOUT_MONO:
186	case AV_CH_LAYOUT_SURROUND:
187	case AV_CH_LAYOUT_2_1:
188	case AV_CH_LAYOUT_5POINT0:
189	if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
190	do {
191	#if HAVE_BIGENDIAN
192	bytestream2_get_buffer(&gb, dst16, avctx->channels * 2);
193	dst16 += avctx->channels;
194	#else
195	channel = avctx->channels;
196	do {
197	*dst16++ = bytestream2_get_be16u(&gb);
198	} while (--channel);
199	#endif
200	bytestream2_skip(&gb, 2);
201	} while (--samples);
202	} else {
203	do {
204	channel = avctx->channels;
205	do {
206	*dst32++ = bytestream2_get_be24u(&gb) << 8;
207	} while (--channel);
208	bytestream2_skip(&gb, 3);
209	} while (--samples);
210	}
211	break;
212	/* remapping: L, R, C, LBack, RBack, LF */
213	case AV_CH_LAYOUT_5POINT1:
214	if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
215	do {
216	dst16[0] = bytestream2_get_be16u(&gb);
217	dst16[1] = bytestream2_get_be16u(&gb);
218	dst16[2] = bytestream2_get_be16u(&gb);
219	dst16[4] = bytestream2_get_be16u(&gb);
220	dst16[5] = bytestream2_get_be16u(&gb);
221	dst16[3] = bytestream2_get_be16u(&gb);
222	dst16 += 6;
223	} while (--samples);
224	} else {
225	do {
226	dst32[0] = bytestream2_get_be24u(&gb) << 8;
227	dst32[1] = bytestream2_get_be24u(&gb) << 8;
228	dst32[2] = bytestream2_get_be24u(&gb) << 8;
229	dst32[4] = bytestream2_get_be24u(&gb) << 8;
230	dst32[5] = bytestream2_get_be24u(&gb) << 8;
231	dst32[3] = bytestream2_get_be24u(&gb) << 8;
232	dst32 += 6;
233	} while (--samples);
234	}
235	break;
236	/* remapping: L, R, C, LSide, LBack, RBack, RSide, <unused> */
237	case AV_CH_LAYOUT_7POINT0:
238	if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
239	do {
240	dst16[0] = bytestream2_get_be16u(&gb);
241	dst16[1] = bytestream2_get_be16u(&gb);
242	dst16[2] = bytestream2_get_be16u(&gb);
243	dst16[5] = bytestream2_get_be16u(&gb);
244	dst16[3] = bytestream2_get_be16u(&gb);
245	dst16[4] = bytestream2_get_be16u(&gb);
246	dst16[6] = bytestream2_get_be16u(&gb);
247	dst16 += 7;
248	bytestream2_skip(&gb, 2);
249	} while (--samples);
250	} else {
251	do {
252	dst32[0] = bytestream2_get_be24u(&gb) << 8;
253	dst32[1] = bytestream2_get_be24u(&gb) << 8;
254	dst32[2] = bytestream2_get_be24u(&gb) << 8;
255	dst32[5] = bytestream2_get_be24u(&gb) << 8;
256	dst32[3] = bytestream2_get_be24u(&gb) << 8;
257	dst32[4] = bytestream2_get_be24u(&gb) << 8;
258	dst32[6] = bytestream2_get_be24u(&gb) << 8;
259	dst32 += 7;
260	bytestream2_skip(&gb, 3);
261	} while (--samples);
262	}
263	break;
264	/* remapping: L, R, C, LSide, LBack, RBack, RSide, LF */
265	case AV_CH_LAYOUT_7POINT1:
266	if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
267	do {
268	dst16[0] = bytestream2_get_be16u(&gb);
269	dst16[1] = bytestream2_get_be16u(&gb);
270	dst16[2] = bytestream2_get_be16u(&gb);
271	dst16[6] = bytestream2_get_be16u(&gb);
272	dst16[4] = bytestream2_get_be16u(&gb);
273	dst16[5] = bytestream2_get_be16u(&gb);
274	dst16[7] = bytestream2_get_be16u(&gb);
275	dst16[3] = bytestream2_get_be16u(&gb);
276	dst16 += 8;
277	} while (--samples);
278	} else {
279	do {
280	dst32[0] = bytestream2_get_be24u(&gb) << 8;
281	dst32[1] = bytestream2_get_be24u(&gb) << 8;
282	dst32[2] = bytestream2_get_be24u(&gb) << 8;
283	dst32[6] = bytestream2_get_be24u(&gb) << 8;
284	dst32[4] = bytestream2_get_be24u(&gb) << 8;
285	dst32[5] = bytestream2_get_be24u(&gb) << 8;
286	dst32[7] = bytestream2_get_be24u(&gb) << 8;
287	dst32[3] = bytestream2_get_be24u(&gb) << 8;
288	dst32 += 8;
289	} while (--samples);
290	}
291	break;
292	}
293	}
294
295	*got_frame_ptr = 1;
296
297	retval = bytestream2_tell(&gb);
298	if (avctx->debug & FF_DEBUG_BITSTREAM)
299	av_dlog(avctx, "pcm_bluray_decode_frame: decoded %d -> %d bytes\n",
300	retval, buf_size);
301	return retval + 4;
302	}
303
304	AVCodec ff_pcm_bluray_decoder = {
305	.name = "pcm_bluray",
306	.long_name = NULL_IF_CONFIG_SMALL("PCM signed 16\|20\|24-bit big-endian for Blu-ray media"),
307	.type = AVMEDIA_TYPE_AUDIO,
308	.id = AV_CODEC_ID_PCM_BLURAY,
309	.decode = pcm_bluray_decode_frame,
310	.capabilities = CODEC_CAP_DR1,
311	.sample_fmts = (const enum AVSampleFormat[]){
312	AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_NONE
313	},
314	};