From 22e28216336da876e1fd17f380ce42eaf1446769 Mon Sep 17 00:00:00 2001 From: Tim Redfern Date: Mon, 17 Feb 2014 13:36:38 +0000 Subject: chasing indexing error --- ffmpeg/libavdevice/openal-dec.c | 252 ---------------------------------------- 1 file changed, 252 deletions(-) delete mode 100644 ffmpeg/libavdevice/openal-dec.c (limited to 'ffmpeg/libavdevice/openal-dec.c') diff --git a/ffmpeg/libavdevice/openal-dec.c b/ffmpeg/libavdevice/openal-dec.c deleted file mode 100644 index 93633ff..0000000 --- a/ffmpeg/libavdevice/openal-dec.c +++ /dev/null @@ -1,252 +0,0 @@ -/* - * Copyright (c) 2011 Jonathan Baldwin - * - * This file is part of FFmpeg. - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH - * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY - * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, - * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM - * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR - * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR - * PERFORMANCE OF THIS SOFTWARE. - */ - -/** - * @file - * OpenAL 1.1 capture device for libavdevice - **/ - -#include -#include - -#include "libavutil/opt.h" -#include "libavutil/time.h" -#include "libavformat/internal.h" -#include "avdevice.h" - -typedef struct { - AVClass *class; - /** OpenAL capture device context. **/ - ALCdevice *device; - /** The number of channels in the captured audio. **/ - int channels; - /** The sample rate (in Hz) of the captured audio. **/ - int sample_rate; - /** The sample size (in bits) of the captured audio. **/ - int sample_size; - /** The OpenAL sample format of the captured audio. **/ - ALCenum sample_format; - /** The number of bytes between two consecutive samples of the same channel/component. **/ - ALCint sample_step; - /** If true, print a list of capture devices on this system and exit. **/ - int list_devices; -} al_data; - -typedef struct { - ALCenum al_fmt; - enum AVCodecID codec_id; - int channels; -} al_format_info; - -#define LOWEST_AL_FORMAT FFMIN(FFMIN(AL_FORMAT_MONO8,AL_FORMAT_MONO16),FFMIN(AL_FORMAT_STEREO8,AL_FORMAT_STEREO16)) - -/** - * Get information about an AL_FORMAT value. - * @param al_fmt the AL_FORMAT value to find information about. - * @return A pointer to a structure containing information about the AL_FORMAT value. - */ -static inline al_format_info* get_al_format_info(ALCenum al_fmt) -{ - static al_format_info info_table[] = { - [AL_FORMAT_MONO8-LOWEST_AL_FORMAT] = {AL_FORMAT_MONO8, AV_CODEC_ID_PCM_U8, 1}, - [AL_FORMAT_MONO16-LOWEST_AL_FORMAT] = {AL_FORMAT_MONO16, AV_NE (AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE), 1}, - [AL_FORMAT_STEREO8-LOWEST_AL_FORMAT] = {AL_FORMAT_STEREO8, AV_CODEC_ID_PCM_U8, 2}, - [AL_FORMAT_STEREO16-LOWEST_AL_FORMAT] = {AL_FORMAT_STEREO16, AV_NE (AV_CODEC_ID_PCM_S16BE, AV_CODEC_ID_PCM_S16LE), 2}, - }; - - return &info_table[al_fmt-LOWEST_AL_FORMAT]; -} - -/** - * Get the OpenAL error code, translated into an av/errno error code. - * @param device The ALC device to check for errors. - * @param error_msg_ret A pointer to a char* in which to return the error message, or NULL if desired. - * @return The error code, or 0 if there is no error. - */ -static inline int al_get_error(ALCdevice *device, const char** error_msg_ret) -{ - ALCenum error = alcGetError(device); - if (error_msg_ret) - *error_msg_ret = (const char*) alcGetString(device, error); - switch (error) { - case ALC_NO_ERROR: - return 0; - case ALC_INVALID_DEVICE: - return AVERROR(ENODEV); - break; - case ALC_INVALID_CONTEXT: - case ALC_INVALID_ENUM: - case ALC_INVALID_VALUE: - return AVERROR(EINVAL); - break; - case ALC_OUT_OF_MEMORY: - return AVERROR(ENOMEM); - break; - default: - return AVERROR(EIO); - } -} - -/** - * Print out a list of OpenAL capture devices on this system. - */ -static inline void print_al_capture_devices(void *log_ctx) -{ - const char *devices; - - if (!(devices = alcGetString(NULL, ALC_CAPTURE_DEVICE_SPECIFIER))) - return; - - av_log(log_ctx, AV_LOG_INFO, "List of OpenAL capture devices on this system:\n"); - - for (; *devices != '\0'; devices += strlen(devices) + 1) - av_log(log_ctx, AV_LOG_INFO, " %s\n", devices); -} - -static int read_header(AVFormatContext *ctx) -{ - al_data *ad = ctx->priv_data; - static const ALCenum sample_formats[2][2] = { - { AL_FORMAT_MONO8, AL_FORMAT_STEREO8 }, - { AL_FORMAT_MONO16, AL_FORMAT_STEREO16 } - }; - int error = 0; - const char *error_msg; - AVStream *st = NULL; - AVCodecContext *codec = NULL; - - if (ad->list_devices) { - print_al_capture_devices(ctx); - return AVERROR_EXIT; - } - - ad->sample_format = sample_formats[ad->sample_size/8-1][ad->channels-1]; - - /* Open device for capture */ - ad->device = - alcCaptureOpenDevice(ctx->filename[0] ? ctx->filename : NULL, - ad->sample_rate, - ad->sample_format, - ad->sample_rate); /* Maximum 1 second of sample data to be read at once */ - - if (error = al_get_error(ad->device, &error_msg)) goto fail; - - /* Create stream */ - if (!(st = avformat_new_stream(ctx, NULL))) { - error = AVERROR(ENOMEM); - goto fail; - } - - /* We work in microseconds */ - avpriv_set_pts_info(st, 64, 1, 1000000); - - /* Set codec parameters */ - codec = st->codec; - codec->codec_type = AVMEDIA_TYPE_AUDIO; - codec->sample_rate = ad->sample_rate; - codec->channels = get_al_format_info(ad->sample_format)->channels; - codec->codec_id = get_al_format_info(ad->sample_format)->codec_id; - - /* This is needed to read the audio data */ - ad->sample_step = (av_get_bits_per_sample(get_al_format_info(ad->sample_format)->codec_id) * - get_al_format_info(ad->sample_format)->channels) / 8; - - /* Finally, start the capture process */ - alcCaptureStart(ad->device); - - return 0; - -fail: - /* Handle failure */ - if (ad->device) - alcCaptureCloseDevice(ad->device); - if (error_msg) - av_log(ctx, AV_LOG_ERROR, "Cannot open device: %s\n", error_msg); - return error; -} - -static int read_packet(AVFormatContext* ctx, AVPacket *pkt) -{ - al_data *ad = ctx->priv_data; - int error=0; - const char *error_msg; - ALCint nb_samples; - - /* Get number of samples available */ - alcGetIntegerv(ad->device, ALC_CAPTURE_SAMPLES, (ALCsizei) sizeof(ALCint), &nb_samples); - if (error = al_get_error(ad->device, &error_msg)) goto fail; - - /* Create a packet of appropriate size */ - av_new_packet(pkt, nb_samples*ad->sample_step); - pkt->pts = av_gettime(); - - /* Fill the packet with the available samples */ - alcCaptureSamples(ad->device, pkt->data, nb_samples); - if (error = al_get_error(ad->device, &error_msg)) goto fail; - - return pkt->size; -fail: - /* Handle failure */ - if (pkt->data) - av_destruct_packet(pkt); - if (error_msg) - av_log(ctx, AV_LOG_ERROR, "Error: %s\n", error_msg); - return error; -} - -static int read_close(AVFormatContext* ctx) -{ - al_data *ad = ctx->priv_data; - - if (ad->device) { - alcCaptureStop(ad->device); - alcCaptureCloseDevice(ad->device); - } - return 0; -} - -#define OFFSET(x) offsetof(al_data, x) - -static const AVOption options[] = { - {"channels", "set number of channels", OFFSET(channels), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, AV_OPT_FLAG_DECODING_PARAM }, - {"sample_rate", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, 192000, AV_OPT_FLAG_DECODING_PARAM }, - {"sample_size", "set sample size", OFFSET(sample_size), AV_OPT_TYPE_INT, {.i64=16}, 8, 16, AV_OPT_FLAG_DECODING_PARAM }, - {"list_devices", "list available devices", OFFSET(list_devices), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM, "list_devices" }, - {"true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "list_devices" }, - {"false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "list_devices" }, - {NULL}, -}; - -static const AVClass class = { - .class_name = "openal", - .item_name = av_default_item_name, - .option = options, - .version = LIBAVUTIL_VERSION_INT -}; - -AVInputFormat ff_openal_demuxer = { - .name = "openal", - .long_name = NULL_IF_CONFIG_SMALL("OpenAL audio capture device"), - .priv_data_size = sizeof(al_data), - .read_probe = NULL, - .read_header = read_header, - .read_packet = read_packet, - .read_close = read_close, - .flags = AVFMT_NOFILE, - .priv_class = &class -}; -- cgit v1.2.3