/* * This file is part of MPlayer. * * MPlayer is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * MPlayer 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 General Public License for more details. * * You should have received a copy of the GNU General Public License along * with MPlayer; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include #include #include #include #include #include "talloc.h" #include "config.h" #include "ad_internal.h" #include "audio/format.h" #include "audio/reorder_ch.h" static const ad_info_t info = { "Uncompressed PCM audio decoder", "pcm", "Nick Kurshev", "A'rpi", "" }; struct ad_pcm_context { unsigned char *buffer; int buffer_pos; int buffer_len; int buffer_size; }; LIBAD_EXTERN(pcm) static int init(sh_audio_t * sh_audio) { WAVEFORMATEX *h = sh_audio->wf; if (!h) return 0; sh_audio->i_bps = h->nAvgBytesPerSec; sh_audio->channels = h->nChannels; sh_audio->samplerate = h->nSamplesPerSec; sh_audio->samplesize = (h->wBitsPerSample + 7) / 8; sh_audio->sample_format = AF_FORMAT_S16_LE; // default switch (sh_audio->format) { /* hardware formats: */ case 0x0: case 0x1: // Microsoft PCM case 0xfffe: // Extended switch (sh_audio->samplesize) { case 1: sh_audio->sample_format = AF_FORMAT_U8; break; case 2: sh_audio->sample_format = AF_FORMAT_S16_LE; break; case 3: sh_audio->sample_format = AF_FORMAT_S24_LE; break; case 4: sh_audio->sample_format = AF_FORMAT_S32_LE; break; } break; case 0x3: // IEEE float sh_audio->sample_format = AF_FORMAT_FLOAT_LE; break; case 0x6: sh_audio->sample_format = AF_FORMAT_A_LAW; break; case 0x7: sh_audio->sample_format = AF_FORMAT_MU_LAW; break; case 0x11: sh_audio->sample_format = AF_FORMAT_IMA_ADPCM; break; case 0x50: sh_audio->sample_format = AF_FORMAT_MPEG2; break; /* case 0x2000: sh_audio->sample_format=AFMT_AC3; */ case 0x20776172: // 'raw ' sh_audio->sample_format = AF_FORMAT_S16_BE; if (sh_audio->samplesize == 1) sh_audio->sample_format = AF_FORMAT_U8; break; case 0x736F7774: // 'twos' sh_audio->sample_format = AF_FORMAT_S16_BE; // intended fall-through case 0x74776F73: // 'sowt' if (sh_audio->samplesize == 1) sh_audio->sample_format = AF_FORMAT_S8; break; case 0x32336c66: // 'fl32', bigendian float32 case 0x32334C46: // 'FL32', bigendian float32 in aiff sh_audio->sample_format = AF_FORMAT_FLOAT_BE; sh_audio->samplesize = 4; break; case 0x666c3332: // '23lf', little endian float32, MPlayer internal fourCC case 0x6D63706C: // 'lpcm' sh_audio->sample_format = AF_FORMAT_FLOAT_LE; sh_audio->samplesize = 4; break; /* case 0x34366c66: // 'fl64', bigendian float64 sh_audio->sample_format=AF_FORMAT_FLOAT_BE; sh_audio->samplesize=8; break; case 0x666c3634: // '46lf', little endian float64, MPlayer internal fourCC sh_audio->sample_format=AF_FORMAT_FLOAT_LE; sh_audio->samplesize=8; break;*/ case 0x34326e69: // 'in24', bigendian int24 sh_audio->sample_format = AF_FORMAT_S24_BE; sh_audio->samplesize = 3; break; case 0x696e3234: // '42ni', little endian int24, MPlayer internal fourCC sh_audio->sample_format = AF_FORMAT_S24_LE; sh_audio->samplesize = 3; break; case 0x32336e69: // 'in32', bigendian int32 sh_audio->sample_format = AF_FORMAT_S32_BE; sh_audio->samplesize = 4; break; case 0x696e3332: // '23ni', little endian int32, MPlayer internal fourCC sh_audio->sample_format = AF_FORMAT_S32_LE; sh_audio->samplesize = 4; break; case MKTAG('M', 'P', 'a', 'f'): sh_audio->sample_format = h->wFormatTag; sh_audio->samplesize = (af_fmt2bits(sh_audio->sample_format) + 7) / 8; break; default: if (sh_audio->samplesize != 2) sh_audio->sample_format = AF_FORMAT_U8; } if (!sh_audio->samplesize) // this would cause MPlayer to hang later sh_audio->samplesize = 2; sh_audio->context = talloc_zero(NULL, struct ad_pcm_context); return 1; } static int preinit(sh_audio_t *sh) { sh->audio_out_minsize = 2048; return 1; } static void uninit(sh_audio_t *sh) { talloc_free(sh->context); } static int control(sh_audio_t *sh, int cmd, void *arg, ...) { struct ad_pcm_context *ctx = sh->context; int skip; switch (cmd) { case ADCTRL_RESYNC_STREAM: ctx->buffer_len = 0; return true; case ADCTRL_SKIP_FRAME: skip = sh->i_bps / 16; skip = skip & (~3); demux_read_data(sh->ds, NULL, skip); return CONTROL_TRUE; } return CONTROL_UNKNOWN; } static int decode_audio(sh_audio_t *sh_audio, unsigned char *buf, int minlen, int maxlen) { int unitsize = sh_audio->channels * sh_audio->samplesize; minlen = (minlen + unitsize - 1) / unitsize * unitsize; if (minlen > maxlen) // if someone needs hundreds of channels adjust audio_out_minsize // based on channels in preinit() return -1; int len = 0; struct ad_pcm_context *ctx = sh_audio->context; while (len < minlen) { if (ctx->buffer_len - ctx->buffer_pos <= 0) { double pts; unsigned char *ptr; int plen = ds_get_packet_pts(sh_audio->ds, &ptr, &pts); if (plen < 0) break; if (ctx->buffer_size < plen) { talloc_free(ctx->buffer); ctx->buffer = talloc_size(ctx, plen); ctx->buffer_size = plen; } memcpy(ctx->buffer, ptr, plen); ctx->buffer_len = plen; ctx->buffer_pos = 0; if (pts != MP_NOPTS_VALUE) { sh_audio->pts = pts; sh_audio->pts_bytes = 0; } } int from_stored = ctx->buffer_len - ctx->buffer_pos; if (from_stored > minlen - len) from_stored = minlen - len; memcpy(buf + len, ctx->buffer + ctx->buffer_pos, from_stored); ctx->buffer_pos += from_stored; sh_audio->pts_bytes += from_stored; len += from_stored; } if (len % unitsize) { mp_msg(MSGT_DECAUDIO, MSGL_WARN, "[ad_pcm] discarding partial sample " "at end\n"); len -= len % unitsize; } if (len == 0) len = -1; // The loop above only exits at error/EOF if (len > 0 && sh_audio->channels >= 5) { reorder_channel_nch(buf, AF_CHANNEL_LAYOUT_WAVEEX_DEFAULT, AF_CHANNEL_LAYOUT_MPLAYER_DEFAULT, sh_audio->channels, len / sh_audio->samplesize, sh_audio->samplesize); } return len; }