diff options
Diffstat (limited to 'libavcodec/s302m.c')
| -rw-r--r-- | libavcodec/s302m.c | 112 |
1 files changed, 96 insertions, 16 deletions
diff --git a/libavcodec/s302m.c b/libavcodec/s302m.c index 36384fb29a..24130d8786 100644 --- a/libavcodec/s302m.c +++ b/libavcodec/s302m.c @@ -3,24 +3,25 @@ * Copyright (c) 2008 Laurent Aimar <fenrir@videolan.org> * Copyright (c) 2009 Baptiste Coudurier <baptiste.coudurier@gmail.com> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/intreadwrite.h" +#include "libavutil/opt.h" #include "libavutil/log.h" #include "avcodec.h" #include "internal.h" @@ -28,6 +29,11 @@ #define AES3_HEADER_LEN 4 +typedef struct S302Context { + AVClass *class; + int non_pcm_mode; +} S302Context; + static int s302m_parse_frame_header(AVCodecContext *avctx, const uint8_t *buf, int buf_size) { @@ -59,18 +65,26 @@ static int s302m_parse_frame_header(AVCodecContext *avctx, const uint8_t *buf, } /* Set output properties */ - avctx->bits_per_coded_sample = bits; + avctx->bits_per_raw_sample = bits; if (bits > 16) avctx->sample_fmt = AV_SAMPLE_FMT_S32; else avctx->sample_fmt = AV_SAMPLE_FMT_S16; avctx->channels = channels; - avctx->sample_rate = 48000; - avctx->bit_rate = 48000 * avctx->channels * (avctx->bits_per_coded_sample + 4) + - 32 * (48000 / (buf_size * 8 / - (avctx->channels * - (avctx->bits_per_coded_sample + 4)))); + switch(channels) { + case 2: + avctx->channel_layout = AV_CH_LAYOUT_STEREO; + break; + case 4: + avctx->channel_layout = AV_CH_LAYOUT_QUAD; + break; + case 6: + avctx->channel_layout = AV_CH_LAYOUT_5POINT1_BACK; + break; + case 8: + avctx->channel_layout = AV_CH_LAYOUT_5POINT1_BACK | AV_CH_LAYOUT_STEREO_DOWNMIX; + } return frame_size; } @@ -78,10 +92,13 @@ static int s302m_parse_frame_header(AVCodecContext *avctx, const uint8_t *buf, static int s302m_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt) { + S302Context *s = avctx->priv_data; AVFrame *frame = data; const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; int block_size, ret; + int i; + int non_pcm_data_type = -1; int frame_size = s302m_parse_frame_header(avctx, buf, buf_size); if (frame_size < 0) @@ -91,16 +108,16 @@ static int s302m_decode_frame(AVCodecContext *avctx, void *data, buf += AES3_HEADER_LEN; /* get output buffer */ - block_size = (avctx->bits_per_coded_sample + 4) / 4; + block_size = (avctx->bits_per_raw_sample + 4) / 4; frame->nb_samples = 2 * (buf_size / block_size) / avctx->channels; - if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) { - av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) return ret; - } + avctx->bit_rate = 48000 * avctx->channels * (avctx->bits_per_raw_sample + 4) + + 32 * 48000 / frame->nb_samples; buf_size = (frame->nb_samples * avctx->channels / 2) * block_size; - if (avctx->bits_per_coded_sample == 24) { + if (avctx->bits_per_raw_sample == 24) { uint32_t *o = (uint32_t *)frame->data[0]; for (; buf_size > 6; buf_size -= 7) { *o++ = (ff_reverse[buf[2]] << 24) | @@ -112,7 +129,17 @@ static int s302m_decode_frame(AVCodecContext *avctx, void *data, (ff_reverse[buf[3] & 0x0f] << 4); buf += 7; } - } else if (avctx->bits_per_coded_sample == 20) { + o = (uint32_t *)frame->data[0]; + if (avctx->channels == 2) + for (i=0; i<frame->nb_samples * 2 - 6; i+=2) { + if (o[i] || o[i+1] || o[i+2] || o[i+3]) + break; + if (o[i+4] == 0x96F87200U && o[i+5] == 0xA54E1F00) { + non_pcm_data_type = (o[i+6] >> 16) & 0x1F; + break; + } + } + } else if (avctx->bits_per_raw_sample == 20) { uint32_t *o = (uint32_t *)frame->data[0]; for (; buf_size > 5; buf_size -= 6) { *o++ = (ff_reverse[buf[2] & 0xf0] << 28) | @@ -123,6 +150,16 @@ static int s302m_decode_frame(AVCodecContext *avctx, void *data, (ff_reverse[buf[3]] << 12); buf += 6; } + o = (uint32_t *)frame->data[0]; + if (avctx->channels == 2) + for (i=0; i<frame->nb_samples * 2 - 6; i+=2) { + if (o[i] || o[i+1] || o[i+2] || o[i+3]) + break; + if (o[i+4] == 0x6F872000U && o[i+5] == 0x54E1F000) { + non_pcm_data_type = (o[i+6] >> 16) & 0x1F; + break; + } + } } else { uint16_t *o = (uint16_t *)frame->data[0]; for (; buf_size > 4; buf_size -= 5) { @@ -133,18 +170,61 @@ static int s302m_decode_frame(AVCodecContext *avctx, void *data, (ff_reverse[buf[2]] >> 4); buf += 5; } + o = (uint16_t *)frame->data[0]; + if (avctx->channels == 2) + for (i=0; i<frame->nb_samples * 2 - 6; i+=2) { + if (o[i] || o[i+1] || o[i+2] || o[i+3]) + break; + if (o[i+4] == 0xF872U && o[i+5] == 0x4E1F) { + non_pcm_data_type = (o[i+6] & 0x1F); + break; + } + } + } + + if (non_pcm_data_type != -1) { + if (s->non_pcm_mode == 3) { + av_log(avctx, AV_LOG_ERROR, + "S302 non PCM mode with data type %d not supported\n", + non_pcm_data_type); + return AVERROR_PATCHWELCOME; + } + if (s->non_pcm_mode & 1) { + return avpkt->size; + } } + avctx->sample_rate = 48000; + *got_frame_ptr = 1; return avpkt->size; } +#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_DECODING_PARAM +static const AVOption s302m_options[] = { + {"non_pcm_mode", "Chooses what to do with NON-PCM", offsetof(S302Context, non_pcm_mode), FF_OPT_TYPE_INT, {.i64 = 3}, 0, 3, FLAGS, "non_pcm_mode"}, + {"copy" , "Pass NON-PCM through unchanged" , 0, FF_OPT_TYPE_CONST, {.i64 = 0}, 0, 3, FLAGS, "non_pcm_mode"}, + {"drop" , "Drop NON-PCM" , 0, FF_OPT_TYPE_CONST, {.i64 = 1}, 0, 3, FLAGS, "non_pcm_mode"}, + {"decode_copy" , "Decode if possible else passthrough", 0, FF_OPT_TYPE_CONST, {.i64 = 2}, 0, 3, FLAGS, "non_pcm_mode"}, + {"decode_drop" , "Decode if possible else drop" , 0, FF_OPT_TYPE_CONST, {.i64 = 3}, 0, 3, FLAGS, "non_pcm_mode"}, + {NULL} +}; + +static const AVClass s302m_class = { + "SMPTE 302M Decoder", + av_default_item_name, + s302m_options, + LIBAVUTIL_VERSION_INT, +}; + AVCodec ff_s302m_decoder = { .name = "s302m", .long_name = NULL_IF_CONFIG_SMALL("SMPTE 302M"), .type = AVMEDIA_TYPE_AUDIO, .id = AV_CODEC_ID_S302M, + .priv_data_size = sizeof(S302Context), .decode = s302m_decode_frame, .capabilities = CODEC_CAP_DR1, + .priv_class = &s302m_class, }; |