| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * LPCM codecs for PCM formats found in Blu-ray m2ts streams | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | #include "libavutil/channel_layout.h" | ||
| 22 | #include "avcodec.h" | ||
| 23 | #include "bytestream.h" | ||
| 24 | #include "codec_internal.h" | ||
| 25 | #include "encode.h" | ||
| 26 | |||
| 27 | typedef struct BlurayPCMEncContext { | ||
| 28 | uint16_t header; // Header added to every frame | ||
| 29 | } BlurayPCMEncContext; | ||
| 30 | |||
| 31 | ✗ | static av_cold int pcm_bluray_encode_init(AVCodecContext *avctx) | |
| 32 | { | ||
| 33 | ✗ | BlurayPCMEncContext *s = avctx->priv_data; | |
| 34 | uint8_t ch_layout; | ||
| 35 | int quant, freq, frame_size; | ||
| 36 | |||
| 37 | ✗ | switch (avctx->sample_fmt) { | |
| 38 | ✗ | case AV_SAMPLE_FMT_S16: | |
| 39 | ✗ | avctx->bits_per_coded_sample = 16; | |
| 40 | ✗ | frame_size = 240; | |
| 41 | ✗ | quant = 1; | |
| 42 | ✗ | break; | |
| 43 | ✗ | case AV_SAMPLE_FMT_S32: | |
| 44 | ✗ | frame_size = 360; | |
| 45 | ✗ | avctx->bits_per_coded_sample = 24; | |
| 46 | ✗ | quant = 3; | |
| 47 | ✗ | break; | |
| 48 | ✗ | default: | |
| 49 | ✗ | return AVERROR_BUG; | |
| 50 | } | ||
| 51 | |||
| 52 | ✗ | switch (avctx->sample_rate) { | |
| 53 | ✗ | case 48000: | |
| 54 | ✗ | freq = 1; | |
| 55 | ✗ | break; | |
| 56 | ✗ | case 96000: | |
| 57 | ✗ | freq = 4; | |
| 58 | ✗ | break; | |
| 59 | ✗ | case 192000: | |
| 60 | ✗ | freq = 5; | |
| 61 | ✗ | break; | |
| 62 | ✗ | default: | |
| 63 | ✗ | return AVERROR_BUG; | |
| 64 | } | ||
| 65 | |||
| 66 | ✗ | switch (av_channel_layout_subset(&avctx->ch_layout, ~(uint64_t)0)) { | |
| 67 | ✗ | case AV_CH_LAYOUT_MONO: | |
| 68 | ✗ | ch_layout = 1; | |
| 69 | ✗ | break; | |
| 70 | ✗ | case AV_CH_LAYOUT_STEREO: | |
| 71 | ✗ | ch_layout = 3; | |
| 72 | ✗ | break; | |
| 73 | ✗ | case AV_CH_LAYOUT_SURROUND: | |
| 74 | ✗ | ch_layout = 4; | |
| 75 | ✗ | break; | |
| 76 | ✗ | case AV_CH_LAYOUT_2_1: | |
| 77 | ✗ | ch_layout = 5; | |
| 78 | ✗ | break; | |
| 79 | ✗ | case AV_CH_LAYOUT_4POINT0: | |
| 80 | ✗ | ch_layout = 6; | |
| 81 | ✗ | break; | |
| 82 | ✗ | case AV_CH_LAYOUT_2_2: | |
| 83 | ✗ | ch_layout = 7; | |
| 84 | ✗ | break; | |
| 85 | ✗ | case AV_CH_LAYOUT_5POINT0: | |
| 86 | ✗ | ch_layout = 8; | |
| 87 | ✗ | break; | |
| 88 | ✗ | case AV_CH_LAYOUT_5POINT1: | |
| 89 | ✗ | ch_layout = 9; | |
| 90 | ✗ | break; | |
| 91 | ✗ | case AV_CH_LAYOUT_7POINT0: | |
| 92 | ✗ | ch_layout = 10; | |
| 93 | ✗ | break; | |
| 94 | ✗ | case AV_CH_LAYOUT_7POINT1: | |
| 95 | ✗ | ch_layout = 11; | |
| 96 | ✗ | break; | |
| 97 | ✗ | default: | |
| 98 | ✗ | return AVERROR_BUG; | |
| 99 | } | ||
| 100 | |||
| 101 | ✗ | s->header = (((ch_layout << 4) | freq) << 8) | (quant << 6); | |
| 102 | ✗ | avctx->frame_size = frame_size; | |
| 103 | |||
| 104 | ✗ | return 0; | |
| 105 | } | ||
| 106 | |||
| 107 | ✗ | static int pcm_bluray_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, | |
| 108 | const AVFrame *frame, int *got_packet_ptr) | ||
| 109 | { | ||
| 110 | ✗ | BlurayPCMEncContext *s = avctx->priv_data; | |
| 111 | int sample_size, samples, channel, num_dest_channels; | ||
| 112 | const int16_t *src16; | ||
| 113 | const int32_t *src32; | ||
| 114 | unsigned pkt_size; | ||
| 115 | PutByteContext pb; | ||
| 116 | int ret; | ||
| 117 | |||
| 118 | ✗ | num_dest_channels = FFALIGN(avctx->ch_layout.nb_channels, 2); | |
| 119 | ✗ | sample_size = (num_dest_channels * | |
| 120 | ✗ | (avctx->sample_fmt == AV_SAMPLE_FMT_S16 ? 16 : 24)) >> 3; | |
| 121 | ✗ | samples = frame->nb_samples; | |
| 122 | |||
| 123 | ✗ | pkt_size = sample_size * samples + 4; | |
| 124 | |||
| 125 | ✗ | if ((ret = ff_get_encode_buffer(avctx, avpkt, pkt_size, 0)) < 0) | |
| 126 | ✗ | return ret; | |
| 127 | |||
| 128 | ✗ | AV_WB16(avpkt->data, pkt_size - 4); | |
| 129 | ✗ | AV_WB16(avpkt->data + 2, s->header); | |
| 130 | |||
| 131 | ✗ | src16 = (const int16_t *)frame->data[0]; | |
| 132 | ✗ | src32 = (const int32_t *)frame->data[0]; | |
| 133 | |||
| 134 | ✗ | bytestream2_init_writer(&pb, avpkt->data + 4, avpkt->size - 4); | |
| 135 | |||
| 136 | ✗ | switch (avctx->ch_layout.u.mask) { | |
| 137 | /* cases with same number of source and coded channels */ | ||
| 138 | ✗ | case AV_CH_LAYOUT_STEREO: | |
| 139 | case AV_CH_LAYOUT_4POINT0: | ||
| 140 | case AV_CH_LAYOUT_2_2: | ||
| 141 | ✗ | samples *= num_dest_channels; | |
| 142 | ✗ | if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) { | |
| 143 | #if HAVE_BIGENDIAN | ||
| 144 | bytestream2_put_bufferu(&pb, frame->data[0], samples * 2); | ||
| 145 | #else | ||
| 146 | do { | ||
| 147 | ✗ | bytestream2_put_be16u(&pb, *src16++); | |
| 148 | ✗ | } while (--samples); | |
| 149 | #endif | ||
| 150 | } else { | ||
| 151 | do { | ||
| 152 | ✗ | bytestream2_put_be24u(&pb, (*src32++) >> 8); | |
| 153 | ✗ | } while (--samples); | |
| 154 | } | ||
| 155 | ✗ | break; | |
| 156 | /* cases where number of source channels = coded channels + 1 */ | ||
| 157 | ✗ | case AV_CH_LAYOUT_MONO: | |
| 158 | case AV_CH_LAYOUT_SURROUND: | ||
| 159 | case AV_CH_LAYOUT_2_1: | ||
| 160 | case AV_CH_LAYOUT_5POINT0: | ||
| 161 | ✗ | if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) { | |
| 162 | do { | ||
| 163 | #if HAVE_BIGENDIAN | ||
| 164 | bytestream2_put_bufferu(&pb, (const uint8_t *)src16, avctx->ch_layout.nb_channels * 2); | ||
| 165 | src16 += avctx->ch_layout.nb_channels; | ||
| 166 | #else | ||
| 167 | ✗ | channel = avctx->ch_layout.nb_channels; | |
| 168 | do { | ||
| 169 | ✗ | bytestream2_put_be16u(&pb, *src16++); | |
| 170 | ✗ | } while (--channel); | |
| 171 | #endif | ||
| 172 | ✗ | bytestream2_put_ne16(&pb, 0); | |
| 173 | ✗ | } while (--samples); | |
| 174 | } else { | ||
| 175 | do { | ||
| 176 | ✗ | channel = avctx->ch_layout.nb_channels; | |
| 177 | do { | ||
| 178 | ✗ | bytestream2_put_be24u(&pb, (*src32++) >> 8); | |
| 179 | ✗ | } while (--channel); | |
| 180 | ✗ | bytestream2_put_ne24(&pb, 0); | |
| 181 | ✗ | } while (--samples); | |
| 182 | } | ||
| 183 | ✗ | break; | |
| 184 | /* remapping: L, R, C, LBack, RBack, LF */ | ||
| 185 | ✗ | case AV_CH_LAYOUT_5POINT1: | |
| 186 | ✗ | if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) { | |
| 187 | do { | ||
| 188 | ✗ | bytestream2_put_be16u(&pb, src16[0]); | |
| 189 | ✗ | bytestream2_put_be16u(&pb, src16[1]); | |
| 190 | ✗ | bytestream2_put_be16u(&pb, src16[2]); | |
| 191 | ✗ | bytestream2_put_be16u(&pb, src16[4]); | |
| 192 | ✗ | bytestream2_put_be16u(&pb, src16[5]); | |
| 193 | ✗ | bytestream2_put_be16u(&pb, src16[3]); | |
| 194 | ✗ | src16 += 6; | |
| 195 | ✗ | } while (--samples); | |
| 196 | } else { | ||
| 197 | do { | ||
| 198 | ✗ | bytestream2_put_be24u(&pb, src32[0] >> 8); | |
| 199 | ✗ | bytestream2_put_be24u(&pb, src32[1] >> 8); | |
| 200 | ✗ | bytestream2_put_be24u(&pb, src32[2] >> 8); | |
| 201 | ✗ | bytestream2_put_be24u(&pb, src32[4] >> 8); | |
| 202 | ✗ | bytestream2_put_be24u(&pb, src32[5] >> 8); | |
| 203 | ✗ | bytestream2_put_be24u(&pb, src32[3] >> 8); | |
| 204 | ✗ | src32 += 6; | |
| 205 | ✗ | } while (--samples); | |
| 206 | } | ||
| 207 | ✗ | break; | |
| 208 | /* remapping: L, R, C, LSide, LBack, RBack, RSide, <unused> */ | ||
| 209 | ✗ | case AV_CH_LAYOUT_7POINT0: | |
| 210 | ✗ | if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) { | |
| 211 | do { | ||
| 212 | ✗ | bytestream2_put_be16u(&pb, src16[0]); | |
| 213 | ✗ | bytestream2_put_be16u(&pb, src16[1]); | |
| 214 | ✗ | bytestream2_put_be16u(&pb, src16[2]); | |
| 215 | ✗ | bytestream2_put_be16u(&pb, src16[5]); | |
| 216 | ✗ | bytestream2_put_be16u(&pb, src16[3]); | |
| 217 | ✗ | bytestream2_put_be16u(&pb, src16[4]); | |
| 218 | ✗ | bytestream2_put_be16u(&pb, src16[6]); | |
| 219 | ✗ | src16 += 7; | |
| 220 | ✗ | bytestream2_put_ne16(&pb, 0); | |
| 221 | ✗ | } while (--samples); | |
| 222 | } else { | ||
| 223 | do { | ||
| 224 | ✗ | bytestream2_put_be24u(&pb, src32[0] >> 8); | |
| 225 | ✗ | bytestream2_put_be24u(&pb, src32[1] >> 8); | |
| 226 | ✗ | bytestream2_put_be24u(&pb, src32[2] >> 8); | |
| 227 | ✗ | bytestream2_put_be24u(&pb, src32[5] >> 8); | |
| 228 | ✗ | bytestream2_put_be24u(&pb, src32[3] >> 8); | |
| 229 | ✗ | bytestream2_put_be24u(&pb, src32[4] >> 8); | |
| 230 | ✗ | bytestream2_put_be24u(&pb, src32[6] >> 8); | |
| 231 | ✗ | src32 += 7; | |
| 232 | ✗ | bytestream2_put_ne24(&pb, 0); | |
| 233 | ✗ | } while (--samples); | |
| 234 | } | ||
| 235 | ✗ | break; | |
| 236 | /* remapping: L, R, C, LSide, LBack, RBack, RSide, LF */ | ||
| 237 | ✗ | case AV_CH_LAYOUT_7POINT1: | |
| 238 | ✗ | if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) { | |
| 239 | do { | ||
| 240 | ✗ | bytestream2_put_be16u(&pb, src16[0]); | |
| 241 | ✗ | bytestream2_put_be16u(&pb, src16[1]); | |
| 242 | ✗ | bytestream2_put_be16u(&pb, src16[2]); | |
| 243 | ✗ | bytestream2_put_be16u(&pb, src16[6]); | |
| 244 | ✗ | bytestream2_put_be16u(&pb, src16[4]); | |
| 245 | ✗ | bytestream2_put_be16u(&pb, src16[5]); | |
| 246 | ✗ | bytestream2_put_be16u(&pb, src16[7]); | |
| 247 | ✗ | bytestream2_put_be16u(&pb, src16[3]); | |
| 248 | ✗ | src16 += 8; | |
| 249 | ✗ | } while (--samples); | |
| 250 | } else { | ||
| 251 | do { | ||
| 252 | ✗ | bytestream2_put_be24u(&pb, src32[0]); | |
| 253 | ✗ | bytestream2_put_be24u(&pb, src32[1]); | |
| 254 | ✗ | bytestream2_put_be24u(&pb, src32[2]); | |
| 255 | ✗ | bytestream2_put_be24u(&pb, src32[6]); | |
| 256 | ✗ | bytestream2_put_be24u(&pb, src32[4]); | |
| 257 | ✗ | bytestream2_put_be24u(&pb, src32[5]); | |
| 258 | ✗ | bytestream2_put_be24u(&pb, src32[7]); | |
| 259 | ✗ | bytestream2_put_be24u(&pb, src32[3]); | |
| 260 | ✗ | src32 += 8; | |
| 261 | ✗ | } while (--samples); | |
| 262 | } | ||
| 263 | ✗ | break; | |
| 264 | ✗ | default: | |
| 265 | ✗ | return AVERROR_BUG; | |
| 266 | } | ||
| 267 | |||
| 268 | ✗ | *got_packet_ptr = 1; | |
| 269 | |||
| 270 | ✗ | return 0; | |
| 271 | } | ||
| 272 | |||
| 273 | const FFCodec ff_pcm_bluray_encoder = { | ||
| 274 | .p.name = "pcm_bluray", | ||
| 275 | CODEC_LONG_NAME("PCM signed 16|20|24-bit big-endian for Blu-ray media"), | ||
| 276 | .p.type = AVMEDIA_TYPE_AUDIO, | ||
| 277 | .p.id = AV_CODEC_ID_PCM_BLURAY, | ||
| 278 | .priv_data_size = sizeof(BlurayPCMEncContext), | ||
| 279 | .init = pcm_bluray_encode_init, | ||
| 280 | FF_CODEC_ENCODE_CB(pcm_bluray_encode_frame), | ||
| 281 | CODEC_SAMPLERATES(48000, 96000, 192000), | ||
| 282 | CODEC_CH_LAYOUTS(AV_CHANNEL_LAYOUT_MONO, AV_CHANNEL_LAYOUT_STEREO, | ||
| 283 | AV_CHANNEL_LAYOUT_SURROUND, AV_CHANNEL_LAYOUT_2_1, | ||
| 284 | AV_CHANNEL_LAYOUT_4POINT0, AV_CHANNEL_LAYOUT_2_2, | ||
| 285 | AV_CHANNEL_LAYOUT_5POINT0, AV_CHANNEL_LAYOUT_5POINT1, | ||
| 286 | AV_CHANNEL_LAYOUT_7POINT0, AV_CHANNEL_LAYOUT_7POINT1), | ||
| 287 | CODEC_SAMPLEFMTS(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32), | ||
| 288 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE, | ||
| 289 | }; | ||
| 290 |