diff options
Diffstat (limited to 'libmpcodecs/ad_mpc.c')
-rw-r--r-- | libmpcodecs/ad_mpc.c | 231 |
1 files changed, 0 insertions, 231 deletions
diff --git a/libmpcodecs/ad_mpc.c b/libmpcodecs/ad_mpc.c deleted file mode 100644 index 979dce6178..0000000000 --- a/libmpcodecs/ad_mpc.c +++ /dev/null @@ -1,231 +0,0 @@ -/* - * Musepack audio files decoder for MPlayer - * by Reza Jelveh <reza.jelveh@tuhh.de> and - * Reimar Döffinger <Reimar.Doeffinger@stud.uni-karlsruhe.de> - * - * This code may be be relicensed under the terms of the GNU LGPL when it - * becomes part of the FFmpeg project (ffmpeg.org) - * - * 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 <stdio.h> -#include <stdlib.h> -#include <unistd.h> - -#include "config.h" -#include "ad_internal.h" -#include "libaf/af_format.h" -#include "libvo/fastmemcpy.h" - -static const ad_info_t info = -{ - "Musepack audio decoder", - "mpcdec", - "Reza Jelveh and Reimar Döffinger", - "", - "" -}; - -LIBAD_EXTERN(libmusepack) - -#include <mpcdec/mpcdec.h> - -// BUFFER_LENGTH is in MPC_SAMPLE_FORMAT units -#define MAX_FRAMESIZE (4 * MPC_DECODER_BUFFER_LENGTH) -//! this many frames should decode good after seeking -#define MIN_SEEK_GOOD 5 -//! how many frames to discard at most after seeking -#define MAX_SEEK_DISCARD 50 - -typedef struct context_s { - char *header; - int header_len; - sh_audio_t *sh; - uint32_t pos; - mpc_decoder decoder; -} context_t; - -/** - * \brief mpc_reader callback function for reading the header - */ -static mpc_int32_t cb_read(void *data, void *buf, mpc_int32_t size) { - context_t *d = (context_t *)data; - char *p = (char *)buf; - int s = size; - if (d->pos < d->header_len) { - if (s > d->header_len - d->pos) - s = d->header_len - d->pos; - fast_memcpy(p, &d->header[d->pos], s); - } else - s = 0; - memset(&p[s], 0, size - s); - d->pos += size; - return size; -} - -/** - * \brief dummy mpc_reader callback function for seeking - */ -static mpc_bool_t cb_seek(void *data, mpc_int32_t offset ) { - context_t *d = (context_t *)data; - d->pos = offset; - return 1; -} - -/** - * \brief dummy mpc_reader callback function for getting stream position - */ -static mpc_int32_t cb_tell(void *data) { - context_t *d = (context_t *)data; - return d->pos; -} - -/** - * \brief dummy mpc_reader callback function for getting stream length - */ -static mpc_int32_t cb_get_size(void *data) { - return 1 << 30; -} - -/** - * \brief mpc_reader callback function, we cannot seek. - */ -static mpc_bool_t cb_canseek(void *data) { - return 0; -} - - -mpc_reader header_reader = { - .read = cb_read, .seek = cb_seek, .tell = cb_tell, - .get_size = cb_get_size, .canseek = cb_canseek -}; - -static int preinit(sh_audio_t *sh) { - sh->audio_out_minsize = MAX_FRAMESIZE; - return 1; -} - -static void uninit(sh_audio_t *sh) { - free(sh->context); - sh->context = NULL; -} - -static int init(sh_audio_t *sh) { - mpc_streaminfo info; - context_t *cd = malloc(sizeof(context_t)); - - if (!sh->wf || (sh->wf->cbSize < 6 * 4)) { - mp_msg(MSGT_DECAUDIO, MSGL_FATAL, "Missing extradata!\n"); - return 0; - } - cd->header = (char *)(sh->wf + 1); - cd->header_len = sh->wf->cbSize; - cd->sh = sh; - cd->pos = 0; - sh->context = (char *)cd; - - /* read file's streaminfo data */ - mpc_streaminfo_init(&info); - header_reader.data = cd; - if (mpc_streaminfo_read(&info, &header_reader) != ERROR_CODE_OK) { - mp_msg(MSGT_DECAUDIO, MSGL_FATAL, "Not a valid musepack file.\n"); - return 0; - } -// this value is nonsense, since it relies on the get_size function. -// use the value from the demuxer instead. -// sh->i_bps = info.average_bitrate / 8; - sh->channels = info.channels; - sh->samplerate = info.sample_freq; - sh->samplesize = 4; - sh->sample_format = -#if MPC_SAMPLE_FORMAT == float - AF_FORMAT_FLOAT_NE; -#elif MPC_SAMPLE_FORMAT == mpc_int32_t - AF_FORMAT_S32_NE; -#else - #error musepack lib must use either float or mpc_int32_t sample format -#endif - - mpc_decoder_setup(&cd->decoder, NULL); - mpc_decoder_set_streaminfo(&cd->decoder, &info); - return 1; -} - -// FIXME: minlen is currently ignored -static int decode_audio(sh_audio_t *sh, unsigned char *buf, - int minlen, int maxlen) { - int status, len; - MPC_SAMPLE_FORMAT *sample_buffer = (MPC_SAMPLE_FORMAT *)buf; - mpc_uint32_t *packet = NULL; - - context_t *cd = (context_t *) sh->context; - if (maxlen < MAX_FRAMESIZE) { - mp_msg(MSGT_DECAUDIO, MSGL_V, "maxlen too small in decode_audio\n"); - return -1; - } - len = ds_get_packet(sh->ds, (unsigned char **)&packet); - if (len <= 0) return -1; - status = mpc_decoder_decode_frame(&cd->decoder, packet, len, sample_buffer); - if (status == -1) // decode error - mp_msg(MSGT_DECAUDIO, MSGL_FATAL, "Error decoding file.\n"); - if (status <= 0) // error or EOF - return -1; - - status = MPC_FRAME_LENGTH * sh->channels; // one sample per channel -#if MPC_SAMPLE_FORMAT == float || MPC_SAMPLE_FORMAT == mpc_int32_t - status *= 4; -#else - // should not happen - status *= 2; -#endif - return status; -} - -/** - * \brief check if the decoded values are in a sane range - * \param buf decoded buffer - * \param len length of buffer in bytes - * \return 1 if all values are in (-1.01, 1.01) range, 0 otherwise - */ -static int check_clip(void *buf, int len) { -#if MPC_SAMPLE_FORMAT == float - float *p = buf; - if (len < 4) return 1; - len = -len / 4; - p = &p[-len]; - do { - if (p[len] < -1 || p[len] > 1) return 0; - } while (++len); -#endif - return 1; -} - -static int control(sh_audio_t *sh, int cmd, void* arg, ...) { - if (cmd == ADCTRL_RESYNC_STREAM) { - unsigned char *buf = malloc(MAX_FRAMESIZE); - int i; - int nr_ok = 0; - for (i = 0; i < MAX_SEEK_DISCARD; i++) { - int len = decode_audio(sh, buf, 0, MAX_FRAMESIZE); - if (check_clip(buf, len)) nr_ok++; else nr_ok = 0; - if (nr_ok > MIN_SEEK_GOOD) break; - } - free(buf); - } - return CONTROL_UNKNOWN; -} |