diff options
Diffstat (limited to 'debian/transcode/transcode-1.1.7/import/import_oss.c')
| -rw-r--r-- | debian/transcode/transcode-1.1.7/import/import_oss.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/debian/transcode/transcode-1.1.7/import/import_oss.c b/debian/transcode/transcode-1.1.7/import/import_oss.c new file mode 100644 index 00000000..0bda05ad --- /dev/null +++ b/debian/transcode/transcode-1.1.7/import/import_oss.c @@ -0,0 +1,234 @@ +/* + * import_oss.c + * + * Copyright (C) Jacob Meuser - September 2004 + * + * This file is part of transcode, a video stream processing tool + * + * transcode 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, or (at your option) + * any later version. + * + * transcode 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 GNU Make; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#define MOD_NAME "import_oss.so" +#define MOD_VERSION "v0.0.3 (2007-11-18)" +#define MOD_CODEC "(audio) pcm" + +#include "transcode.h" + +static int verbose_flag = TC_QUIET; +static int capability_flag = TC_CAP_PCM; + +#define MOD_PRE oss +#include "import_def.h" + +#include <sys/types.h> +#include <sys/ioctl.h> +#ifdef HAVE_SYS_SOUNDCARD_H +# include <sys/soundcard.h> +#else +# ifdef HAVE_SOUNDCARD_H +# include <soundcard.h> +# endif +#endif + +#include "libtc/optstr.h" + +static int oss_fd = -1; + +static int oss_init(const char *, int, int, int); +static int oss_grab(size_t, char *); +static int oss_stop(void); + + +static int oss_init(const char *audio_device, + int sample_rate, int precision, int channels) +{ + int encoding, rate = sample_rate; + + if (!strcmp(audio_device, "/dev/null") + || !strcmp(audio_device, "/dev/zero")) { + return TC_IMPORT_OK; + } + + if (precision != 8 && precision != 16) { + tc_log_warn(MOD_NAME, "bits/sample must be 8 or 16"); + return TC_IMPORT_ERROR; + } + + encoding = (precision == 8) ? AFMT_U8 : AFMT_S16_LE; + + if ((oss_fd = open(audio_device, O_RDONLY)) < 0) { + tc_log_perror(MOD_NAME, "open audio device"); + return TC_IMPORT_ERROR; + } + + if (ioctl(oss_fd, SNDCTL_DSP_SETFMT, &encoding) < 0) { + tc_log_perror(MOD_NAME, "SNDCTL_DSP_SETFMT"); + return TC_IMPORT_ERROR; + } + + if (ioctl(oss_fd, SNDCTL_DSP_CHANNELS, &channels) < 0) { + tc_log_perror(MOD_NAME, "SNDCTL_DSP_CHANNELS"); + return TC_IMPORT_ERROR; + } + + + if (ioctl(oss_fd, SNDCTL_DSP_SPEED, &rate) < 0) { + tc_log_perror(MOD_NAME, "SNDCTL_DSP_SPEED"); + return TC_IMPORT_ERROR; + } + if (rate != sample_rate) { + tc_log_warn(MOD_NAME, "sample rate requested=%i obtained=%i", + sample_rate, rate); + } + + return TC_IMPORT_OK; +} + +static int oss_grab(size_t size, char *buffer) +{ + int left; + int offset; + int received; + + for (left = size, offset = 0; left > 0;) { + received = read(oss_fd, buffer + offset, left); + if (received == 0) { + tc_log_warn(MOD_NAME, "audio grab: received == 0"); + } + if (received < 0) { + if (errno == EINTR) { + received = 0; + } else { + tc_log_perror(MOD_NAME, "audio grab"); + return TC_IMPORT_ERROR; + } + } + if (received > left) { + tc_log_warn(MOD_NAME, + "read returns more bytes than requested; " + "requested: %d, returned: %d", + left, received); + return TC_IMPORT_ERROR; + } + offset += received; + left -= received; + } + return TC_IMPORT_OK; +} + +static int oss_stop(void) +{ + close(oss_fd); + oss_fd = -1; + + if (verbose_flag & TC_STATS) { + tc_log_warn(MOD_NAME, "totals: (not implemented)"); + } + + return TC_IMPORT_OK; +} + + +/* ------------------------------------------------------------ + * Module interface + * ------------------------------------------------------------*/ + +MOD_open +{ + int ret = TC_IMPORT_OK; + + switch (param->flag) { + case TC_VIDEO: + tc_log_warn(MOD_NAME, "unsupported request (init video)"); + ret = TC_IMPORT_ERROR; + break; + case TC_AUDIO: + if (verbose_flag & TC_DEBUG) { + tc_log_info(MOD_NAME, "OSS audio grabbing"); + } + if (oss_init(vob->audio_in_file, + vob->a_rate, vob->a_bits, vob->a_chan)) { + ret = TC_IMPORT_ERROR; + } + break; + default: + tc_log_warn(MOD_NAME, "unsupported request (init)"); + ret = TC_IMPORT_ERROR; + break; + } + + return ret; +} + + +MOD_decode +{ + int ret = TC_IMPORT_OK; + + switch (param->flag) { + case TC_VIDEO: + tc_log_warn(MOD_NAME, "unsupported request (decode video)"); + ret = TC_IMPORT_ERROR; + break; + case TC_AUDIO: + if (oss_grab(param->size, param->buffer)) { + tc_log_warn(MOD_NAME, "error in grabbing audio"); + ret = TC_IMPORT_ERROR; + } + break; + default: + tc_log_warn(MOD_NAME, "unsupported request (decode)"); + ret = TC_IMPORT_ERROR; + break; + } + + return ret; +} + + +MOD_close +{ + int ret = TC_IMPORT_OK; + + switch (param->flag) { + case TC_VIDEO: + tc_log_warn(MOD_NAME, "unsupported request (close video)"); + ret = TC_IMPORT_ERROR; + break; + case TC_AUDIO: + oss_stop(); + break; + default: + tc_log_warn(MOD_NAME, "unsupported request (close)"); + ret = TC_IMPORT_ERROR; + break; + } + + return ret; +} + +/*************************************************************************/ + +/* + * Local variables: + * c-file-style: "stroustrup" + * c-file-offsets: ((case-label . *) (statement-case-intro . *)) + * indent-tabs-mode: nil + * End: + * + * vim: expandtab shiftwidth=4: + */ + |