Introduce libavdevice

Originally committed as revision 11077 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 465 insertions, 0 deletions

diff --git a/libavdevice/beosaudio.cpp b/libavdevice/beosaudio.cpp
new file mode 100644
index 0000000000..d942d7e45d
--- /dev/null
+++ b/libavdevice/beosaudio.cpp
@@ -0,0 +1,465 @@
+/*
+ * BeOS audio play interface
+ * Copyright (c) 2000, 2001 Fabrice Bellard.
+ *
+ * This file is part of FFmpeg.
+ *
+ * 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.
+ *
+ * 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <signal.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/time.h>
+
+#include <Application.h>
+#include <SoundPlayer.h>
+
+extern "C" {
+#include "avformat.h"
+}
+
+#ifdef HAVE_BSOUNDRECORDER
+#include <SoundRecorder.h>
+using namespace BPrivate::Media::Experimental;
+#endif
+
+/* enable performance checks */
+//#define PERF_CHECK
+
+/* enable Media Kit latency checks */
+//#define LATENCY_CHECK
+
+#define AUDIO_BLOCK_SIZE 4096
+#define AUDIO_BLOCK_COUNT 8
+
+#define AUDIO_BUFFER_SIZE (AUDIO_BLOCK_SIZE*AUDIO_BLOCK_COUNT)
+
+typedef struct {
+    int fd; // UNUSED
+    int sample_rate;
+    int channels;
+    int frame_size; /* in bytes ! */
+    CodecID codec_id;
+    uint8_t buffer[AUDIO_BUFFER_SIZE];
+    int buffer_ptr;
+    /* ring buffer */
+    sem_id input_sem;
+    int input_index;
+    sem_id output_sem;
+    int output_index;
+    BSoundPlayer *player;
+#ifdef HAVE_BSOUNDRECORDER
+    BSoundRecorder *recorder;
+#endif
+    int has_quit; /* signal callbacks not to wait */
+    volatile bigtime_t starve_time;
+} AudioData;
+
+static thread_id main_thid;
+static thread_id bapp_thid;
+static int own_BApp_created = 0;
+static int refcount = 0;
+
+/* create the BApplication and Run() it */
+static int32 bapp_thread(void *arg)
+{
+    new BApplication("application/x-vnd.ffmpeg");
+    own_BApp_created = 1;
+    be_app->Run();
+    /* kill the process group */
+//    kill(0, SIGINT);
+//    kill(main_thid, SIGHUP);
+    return B_OK;
+}
+
+/* create the BApplication only if needed */
+static void create_bapp_if_needed(void)
+{
+    if (refcount++ == 0) {
+        /* needed by libmedia */
+        if (be_app == NULL) {
+            bapp_thid = spawn_thread(bapp_thread, "ffmpeg BApplication", B_NORMAL_PRIORITY, NULL);
+            resume_thread(bapp_thid);
+            while (!own_BApp_created)
+                snooze(50000);
+        }
+    }
+}
+
+static void destroy_bapp_if_needed(void)
+{
+    if (--refcount == 0 && own_BApp_created) {
+        be_app->Lock();
+        be_app->Quit();
+        be_app = NULL;
+    }
+}
+
+/* called back by BSoundPlayer */
+static void audioplay_callback(void *cookie, void *buffer, size_t bufferSize, const media_raw_audio_format &format)
+{
+    AudioData *s;
+    size_t len, amount;
+    unsigned char *buf = (unsigned char *)buffer;
+
+    s = (AudioData *)cookie;
+    if (s->has_quit)
+        return;
+    while (bufferSize > 0) {
+#ifdef PERF_CHECK
+        bigtime_t t;
+        t = system_time();
+#endif
+        len = MIN(AUDIO_BLOCK_SIZE, bufferSize);
+        if (acquire_sem_etc(s->output_sem, len, B_CAN_INTERRUPT, 0LL) < B_OK) {
+            s->has_quit = 1;
+            s->player->SetHasData(false);
+            return;
+        }
+        amount = MIN(len, (AUDIO_BUFFER_SIZE - s->output_index));
+        memcpy(buf, &s->buffer[s->output_index], amount);
+        s->output_index += amount;
+        if (s->output_index >= AUDIO_BUFFER_SIZE) {
+            s->output_index %= AUDIO_BUFFER_SIZE;
+            memcpy(buf + amount, &s->buffer[s->output_index], len - amount);
+            s->output_index += len-amount;
+            s->output_index %= AUDIO_BUFFER_SIZE;
+        }
+        release_sem_etc(s->input_sem, len, 0);
+#ifdef PERF_CHECK
+        t = system_time() - t;
+        s->starve_time = MAX(s->starve_time, t);
+#endif
+        buf += len;
+        bufferSize -= len;
+    }
+}
+
+#ifdef HAVE_BSOUNDRECORDER
+/* called back by BSoundRecorder */
+static void audiorecord_callback(void *cookie, bigtime_t timestamp, void *buffer, size_t bufferSize, const media_multi_audio_format &format)
+{
+    AudioData *s;
+    size_t len, amount;
+    unsigned char *buf = (unsigned char *)buffer;
+
+    s = (AudioData *)cookie;
+    if (s->has_quit)
+        return;
+
+    while (bufferSize > 0) {
+        len = MIN(bufferSize, AUDIO_BLOCK_SIZE);
+        //printf("acquire_sem(input, %d)\n", len);
+        if (acquire_sem_etc(s->input_sem, len, B_CAN_INTERRUPT, 0LL) < B_OK) {
+            s->has_quit = 1;
+            return;
+        }
+        amount = MIN(len, (AUDIO_BUFFER_SIZE - s->input_index));
+        memcpy(&s->buffer[s->input_index], buf, amount);
+        s->input_index += amount;
+        if (s->input_index >= AUDIO_BUFFER_SIZE) {
+            s->input_index %= AUDIO_BUFFER_SIZE;
+            memcpy(&s->buffer[s->input_index], buf + amount, len - amount);
+            s->input_index += len - amount;
+        }
+        release_sem_etc(s->output_sem, len, 0);
+        //printf("release_sem(output, %d)\n", len);
+        buf += len;
+        bufferSize -= len;
+    }
+}
+#endif
+
+static int audio_open(AudioData *s, int is_output, const char *audio_device)
+{
+    int p[2];
+    int ret;
+    media_raw_audio_format format;
+    media_multi_audio_format iformat;
+
+#ifndef HAVE_BSOUNDRECORDER
+    if (!is_output)
+        return AVERROR(EIO); /* not for now */
+#endif
+    s->input_sem = create_sem(AUDIO_BUFFER_SIZE, "ffmpeg_ringbuffer_input");
+    if (s->input_sem < B_OK)
+        return AVERROR(EIO);
+    s->output_sem = create_sem(0, "ffmpeg_ringbuffer_output");
+    if (s->output_sem < B_OK) {
+        delete_sem(s->input_sem);
+        return AVERROR(EIO);
+    }
+    s->input_index = 0;
+    s->output_index = 0;
+    create_bapp_if_needed();
+    s->frame_size = AUDIO_BLOCK_SIZE;
+    /* bump up the priority (avoid realtime though) */
+    set_thread_priority(find_thread(NULL), B_DISPLAY_PRIORITY+1);
+#ifdef HAVE_BSOUNDRECORDER
+    if (!is_output) {
+        bool wait_for_input = false;
+        if (audio_device && !strcmp(audio_device, "wait:"))
+            wait_for_input = true;
+        s->recorder = new BSoundRecorder(&iformat, wait_for_input, "ffmpeg input", audiorecord_callback);
+        if (wait_for_input && (s->recorder->InitCheck() == B_OK)) {
+            s->recorder->WaitForIncomingConnection(&iformat);
+        }
+        if (s->recorder->InitCheck() != B_OK || iformat.format != media_raw_audio_format::B_AUDIO_SHORT) {
+            delete s->recorder;
+            s->recorder = NULL;
+            if (s->input_sem)
+                delete_sem(s->input_sem);
+            if (s->output_sem)
+                delete_sem(s->output_sem);
+            return AVERROR(EIO);
+        }
+        s->codec_id = (iformat.byte_order == B_MEDIA_LITTLE_ENDIAN)?CODEC_ID_PCM_S16LE:CODEC_ID_PCM_S16BE;
+        s->channels = iformat.channel_count;
+        s->sample_rate = (int)iformat.frame_rate;
+        s->frame_size = iformat.buffer_size;
+        s->recorder->SetCookie(s);
+        s->recorder->SetVolume(1.0);
+        s->recorder->Start();
+        return 0;
+    }
+#endif
+    format = media_raw_audio_format::wildcard;
+    format.format = media_raw_audio_format::B_AUDIO_SHORT;
+    format.byte_order = B_HOST_IS_LENDIAN ? B_MEDIA_LITTLE_ENDIAN : B_MEDIA_BIG_ENDIAN;
+    format.channel_count = s->channels;
+    format.buffer_size = s->frame_size;
+    format.frame_rate = s->sample_rate;
+    s->player = new BSoundPlayer(&format, "ffmpeg output", audioplay_callback);
+    if (s->player->InitCheck() != B_OK) {
+        delete s->player;
+        s->player = NULL;
+        if (s->input_sem)
+            delete_sem(s->input_sem);
+        if (s->output_sem)
+            delete_sem(s->output_sem);
+        return AVERROR(EIO);
+    }
+    s->player->SetCookie(s);
+    s->player->SetVolume(1.0);
+    s->player->Start();
+    s->player->SetHasData(true);
+    return 0;
+}
+
+static int audio_close(AudioData *s)
+{
+    if (s->input_sem)
+        delete_sem(s->input_sem);
+    if (s->output_sem)
+        delete_sem(s->output_sem);
+    s->has_quit = 1;
+    if (s->player) {
+        s->player->Stop();
+    }
+    if (s->player)
+        delete s->player;
+#ifdef HAVE_BSOUNDRECORDER
+    if (s->recorder)
+        delete s->recorder;
+#endif
+    destroy_bapp_if_needed();
+    return 0;
+}
+
+/* sound output support */
+static int audio_write_header(AVFormatContext *s1)
+{
+    AudioData *s = (AudioData *)s1->priv_data;
+    AVStream *st;
+    int ret;
+
+    st = s1->streams[0];
+    s->sample_rate = st->codec->sample_rate;
+    s->channels = st->codec->channels;
+    ret = audio_open(s, 1, NULL);
+    if (ret < 0)
+        return AVERROR(EIO);
+    return 0;
+}
+
+static int audio_write_packet(AVFormatContext *s1, int stream_index,
+                              const uint8_t *buf, int size, int64_t force_pts)
+{
+    AudioData *s = (AudioData *)s1->priv_data;
+    int len, ret;
+#ifdef LATENCY_CHECK
+bigtime_t lat1, lat2;
+lat1 = s->player->Latency();
+#endif
+#ifdef PERF_CHECK
+    bigtime_t t = s->starve_time;
+    s->starve_time = 0;
+    printf("starve_time: %lld    \n", t);
+#endif
+    while (size > 0) {
+        int amount;
+        len = MIN(size, AUDIO_BLOCK_SIZE);
+        if (acquire_sem_etc(s->input_sem, len, B_CAN_INTERRUPT, 0LL) < B_OK)
+            return AVERROR(EIO);
+        amount = MIN(len, (AUDIO_BUFFER_SIZE - s->input_index));
+        memcpy(&s->buffer[s->input_index], buf, amount);
+        s->input_index += amount;
+        if (s->input_index >= AUDIO_BUFFER_SIZE) {
+            s->input_index %= AUDIO_BUFFER_SIZE;
+            memcpy(&s->buffer[s->input_index], buf + amount, len - amount);
+            s->input_index += len - amount;
+        }
+        release_sem_etc(s->output_sem, len, 0);
+        buf += len;
+        size -= len;
+    }
+#ifdef LATENCY_CHECK
+lat2 = s->player->Latency();
+printf("#### BSoundPlayer::Latency(): before= %lld, after= %lld\n", lat1, lat2);
+#endif
+    return 0;
+}
+
+static int audio_write_trailer(AVFormatContext *s1)
+{
+    AudioData *s = (AudioData *)s1->priv_data;
+
+    audio_close(s);
+    return 0;
+}
+
+/* grab support */
+
+static int audio_read_header(AVFormatContext *s1, AVFormatParameters *ap)
+{
+    AudioData *s = (AudioData *)s1->priv_data;
+    AVStream *st;
+    int ret;
+
+    if (!ap || ap->sample_rate <= 0 || ap->channels <= 0)
+        return -1;
+
+    st = av_new_stream(s1, 0);
+    if (!st) {
+        return AVERROR(ENOMEM);
+    }
+    s->sample_rate = ap->sample_rate;
+    s->channels = ap->channels;
+
+    ret = audio_open(s, 0, s1->filename);
+    if (ret < 0) {
+        av_free(st);
+        return AVERROR(EIO);
+    }
+    /* take real parameters */
+    st->codec->codec_type = CODEC_TYPE_AUDIO;
+    st->codec->codec_id = s->codec_id;
+    st->codec->sample_rate = s->sample_rate;
+    st->codec->channels = s->channels;
+    return 0;
+    av_set_pts_info(s1, 48, 1, 1000000);  /* 48 bits pts in us */
+}
+
+static int audio_read_packet(AVFormatContext *s1, AVPacket *pkt)
+{
+    AudioData *s = (AudioData *)s1->priv_data;
+    int size;
+    size_t len, amount;
+    unsigned char *buf;
+    status_t err;
+
+    if (av_new_packet(pkt, s->frame_size) < 0)
+        return AVERROR(EIO);
+    buf = (unsigned char *)pkt->data;
+    size = pkt->size;
+    while (size > 0) {
+        len = MIN(AUDIO_BLOCK_SIZE, size);
+        //printf("acquire_sem(output, %d)\n", len);
+        while ((err=acquire_sem_etc(s->output_sem, len, B_CAN_INTERRUPT, 0LL)) == B_INTERRUPTED);
+        if (err < B_OK) {
+            av_free_packet(pkt);
+            return AVERROR(EIO);
+        }
+        amount = MIN(len, (AUDIO_BUFFER_SIZE - s->output_index));
+        memcpy(buf, &s->buffer[s->output_index], amount);
+        s->output_index += amount;
+        if (s->output_index >= AUDIO_BUFFER_SIZE) {
+            s->output_index %= AUDIO_BUFFER_SIZE;
+            memcpy(buf + amount, &s->buffer[s->output_index], len - amount);
+            s->output_index += len-amount;
+            s->output_index %= AUDIO_BUFFER_SIZE;
+        }
+        release_sem_etc(s->input_sem, len, 0);
+        //printf("release_sem(input, %d)\n", len);
+        buf += len;
+        size -= len;
+    }
+    //XXX: add pts info
+    return 0;
+}
+
+static int audio_read_close(AVFormatContext *s1)
+{
+    AudioData *s = (AudioData *)s1->priv_data;
+
+    audio_close(s);
+    return 0;
+}
+
+static AVInputFormat audio_beos_demuxer = {
+    "audio_beos",
+    "audio grab and output",
+    sizeof(AudioData),
+    NULL,
+    audio_read_header,
+    audio_read_packet,
+    audio_read_close,
+    NULL,
+    AVFMT_NOFILE,
+};
+
+AVOutputFormat audio_beos_muxer = {
+    "audio_beos",
+    "audio grab and output",
+    "",
+    "",
+    sizeof(AudioData),
+#ifdef WORDS_BIGENDIAN
+    CODEC_ID_PCM_S16BE,
+#else
+    CODEC_ID_PCM_S16LE,
+#endif
+    CODEC_ID_NONE,
+    audio_write_header,
+    audio_write_packet,
+    audio_write_trailer,
+    AVFMT_NOFILE,
+};
+
+extern "C" {
+
+int audio_init(void)
+{
+    main_thid = find_thread(NULL);
+    av_register_input_format(&audio_beos_demuxer);
+    av_register_output_format(&audio_beos_muxer);
+    return 0;
+}
+
+} // "C"
+