renamed libav to libavformat

Originally committed as revision 1276 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/beosaudio.cpp

@@ -0,0 +1,449 @@
+/*
+ * BeOS audio play interface
+ * Copyright (c) 2000, 2001 Fabrice Bellard.
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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"
+}
+
+/* enable performance checks */
+//#define PERF_CHECK
+
+//const char *audio_device = "/dev/dsp";
+const char *audio_device = "beosaudio:";
+
+/* Pipes are 4k in BeOS IIRC */
+#define AUDIO_BLOCK_SIZE 4096
+//#define AUDIO_BLOCK_SIZE 2048
+#define AUDIO_BLOCK_COUNT 8
+
+#define AUDIO_BUFFER_SIZE (AUDIO_BLOCK_SIZE*AUDIO_BLOCK_COUNT)
+
+/* pipes suck for realtime */
+#define USE_RING_BUFFER 1
+
+typedef struct {
+    int fd;
+    int sample_rate;
+    int channels;
+    int frame_size; /* in bytes ! */
+    CodecID codec_id;
+    int flip_left : 1;
+    UINT8 buffer[AUDIO_BUFFER_SIZE];
+    int buffer_ptr;
+    int pipefd; /* the other end of the pipe */
+    /* ring buffer */
+    sem_id input_sem;
+    int input_index;
+    sem_id output_sem;
+    int output_index;
+    int queued;
+    BSoundPlayer *player;
+    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
+#ifdef USE_RING_BUFFER
+        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);
+#else
+        len = read(s->pipefd, buf, bufferSize);
+#endif
+#ifdef PERF_CHECK
+        t = system_time() - t;
+        s->starve_time = MAX(s->starve_time, t);
+#endif
+#ifndef USE_RING_BUFFER
+        if (len < B_OK) {
+            puts("EPIPE");
+            s->player->SetHasData(false);
+            snooze(100000);
+            return;
+        }
+        if (len == 0) {
+            s->player->SetHasData(false);
+            snooze(100000);
+            return;
+        }
+#endif
+        buf += len;
+        bufferSize -= len;
+    }
+}
+
+static int audio_open(AudioData *s, int is_output)
+{
+    int p[2];
+    int ret;
+    media_raw_audio_format format;
+
+    if (!is_output)
+        return -EIO; /* not for now */
+#ifdef USE_RING_BUFFER
+    s->input_sem = create_sem(AUDIO_BUFFER_SIZE, "ffmpeg_ringbuffer_input");
+//    s->input_sem = create_sem(AUDIO_BLOCK_SIZE, "ffmpeg_ringbuffer_input");
+    if (s->input_sem < B_OK)
+        return -EIO;
+    s->output_sem = create_sem(0, "ffmpeg_ringbuffer_output");
+    if (s->output_sem < B_OK) {
+        delete_sem(s->input_sem);
+        return -EIO;
+    }
+    s->input_index = 0;
+    s->output_index = 0;
+    s->queued = 0;
+#else
+    ret = pipe(p);
+    if (ret < 0)
+        return -EIO;
+    s->fd = p[is_output?1:0];
+    s->pipefd = p[is_output?0:1];
+    if (s->fd < 0) {
+        perror(is_output?"audio out":"audio in");
+        return -EIO;
+    }
+#endif
+    create_bapp_if_needed();
+    /* non blocking mode */
+//    fcntl(s->fd, F_SETFL, O_NONBLOCK);
+//    fcntl(s->pipefd, F_SETFL, O_NONBLOCK);
+    s->frame_size = AUDIO_BLOCK_SIZE;
+    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;
+#ifdef USE_RING_BUFFER
+    if (s->input_sem)
+        delete_sem(s->input_sem);
+    if (s->output_sem)
+        delete_sem(s->output_sem);
+#else
+        close(s->fd);
+        close(s->pipefd);
+#endif
+        return -EIO;
+    }
+    s->player->SetCookie(s);
+    s->player->SetVolume(1.0);
+    s->player->Start();
+    s->player->SetHasData(true);
+    /* bump up the priority (avoid realtime though) */
+    set_thread_priority(find_thread(NULL), B_DISPLAY_PRIORITY+1);
+    return 0;
+}
+
+static int audio_close(AudioData *s)
+{
+#ifdef USE_RING_BUFFER
+    if (s->input_sem)
+        delete_sem(s->input_sem);
+    if (s->output_sem)
+        delete_sem(s->output_sem);
+#endif
+    s->has_quit = 1;
+    if (s->player) {
+        s->player->Stop();
+    }
+    if (s->player)
+        delete s->player;
+#ifndef USE_RING_BUFFER
+    close(s->pipefd);
+    close(s->fd);
+#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);
+    if (ret < 0)
+        return -EIO;
+    return 0;
+}
+
+static int audio_write_packet(AVFormatContext *s1, int stream_index,
+                              UINT8 *buf, int size, int force_pts)
+{
+    AudioData *s = (AudioData *)s1->priv_data;
+    int len, ret;
+#ifdef PERF_CHECK
+    bigtime_t t = s->starve_time;
+    s->starve_time = 0;
+    printf("starve_time: %lld    \n", t);
+#endif
+#ifdef USE_RING_BUFFER
+    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 -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;
+    }
+#else
+    while (size > 0) {
+        len = AUDIO_BLOCK_SIZE - s->buffer_ptr;
+        if (len > size)
+            len = size;
+        memcpy(s->buffer + s->buffer_ptr, buf, len);
+        s->buffer_ptr += len;
+        if (s->buffer_ptr >= AUDIO_BLOCK_SIZE) {
+            for(;;) {
+//snooze(1000);
+                ret = write(s->fd, s->buffer, AUDIO_BLOCK_SIZE);
+                if (ret != 0)
+                    break;
+                if (ret < 0 && (errno != EAGAIN && errno != EINTR))
+                    return -EIO;
+            }
+            s->buffer_ptr = 0;
+        }
+        buf += len;
+        size -= len;
+    }
+#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 -ENOMEM;
+    }
+    s->sample_rate = ap->sample_rate;
+    s->channels = ap->channels;
+
+    ret = audio_open(s, 0);
+    if (ret < 0) {
+        av_free(st);
+        return -EIO;
+    } else {
+        /* 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;
+    }
+}
+
+static int audio_read_packet(AVFormatContext *s1, AVPacket *pkt)
+{
+    AudioData *s = (AudioData *)s1->priv_data;
+    int ret;
+
+    if (av_new_packet(pkt, s->frame_size) < 0)
+        return -EIO;
+    for(;;) {
+        ret = read(s->fd, pkt->data, pkt->size);
+        if (ret > 0)
+            break;
+        if (ret == -1 && (errno == EAGAIN || errno == EINTR)) {
+            av_free_packet(pkt);
+            pkt->size = 0;
+            return 0;
+        }
+        if (!(ret == 0 || (ret == -1 && (errno == EAGAIN || errno == EINTR)))) {
+            av_free_packet(pkt);
+            return -EIO;
+        }
+    }
+    pkt->size = ret;
+    if (s->flip_left && s->channels == 2) {
+        int i;
+        short *p = (short *) pkt->data;
+
+        for (i = 0; i < ret; i += 4) {
+            *p = ~*p;
+            p += 2;
+        }
+    }
+    return 0;
+}
+
+static int audio_read_close(AVFormatContext *s1)
+{
+    AudioData *s = (AudioData *)s1->priv_data;
+
+    audio_close(s);
+    return 0;
+}
+
+AVInputFormat audio_in_format = {
+    "audio_device",
+    "audio grab and output",
+    sizeof(AudioData),
+    NULL,
+    audio_read_header,
+    audio_read_packet,
+    audio_read_close,
+    NULL,
+    AVFMT_NOFILE,
+};
+
+AVOutputFormat audio_out_format = {
+    "audio_device",
+    "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_in_format);
+    av_register_output_format(&audio_out_format);
+    return 0;
+}
+
+} // "C"
+