149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
#include "basic_include.h"
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#include "lib/multimedia/msi.h"
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static void fb_free(struct framebuff *fb)
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{
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int32 ret = 0;
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struct msi *msi;
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if (fb) {
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ASSERT(atomic_read(&fb->users) > 0);
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if (!atomic_dec_and_test(&fb->users)) {
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return;
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}
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msi = fb->msi;
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ret = msi_do_cmd(fb->msi, MSI_CMD_FREE_FB, (uint32)fb, 0);
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msi_put(msi);
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if (ret == RET_OK) { //不等于OK表示模块自己管理fb，例如预分配的fb
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ASSERT(!fb->pool); //预分配的framebuff不能执行到这里
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FB_FREE(fb);
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}
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}
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}
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//framebuff 引用计数加1
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void fb_get(struct framebuff *fb)
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{
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if (fb) {
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fb_get(fb->next);
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atomic_inc(&fb->users);
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}
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}
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struct framebuff *fb_alloc(uint8 *data, int32 size, uint16 type, struct msi *msi)
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{
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int32 len = data ? 0 : size;
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struct framebuff *fb = FB_ALLOC(sizeof(struct framebuff) + len);
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if (fb) {
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os_memset(fb, 0, sizeof(struct framebuff));
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atomic_set(&fb->users, 1);
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fb->len = size;
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fb->msi = msi;
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fb->mtype = (type >> 8) & 0xff;
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fb->stype = type & 0xff;
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msi_get(fb->msi);
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if (data) {
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fb->data = data;
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} else if (size) {
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fb->data = (uint8 *)(fb + 1);
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}
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}
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return fb;
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}
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struct framebuff *fb_clone(struct framebuff *fb, uint16 type, struct msi *msi)
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{
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struct framebuff *fb_n = FB_ALLOC(sizeof(struct framebuff));
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if (fb_n) {
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os_memset(fb_n, 0, sizeof(struct framebuff));
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atomic_set(&fb_n->users, 1);
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fb_n->clone = 1;
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fb_n->msi = msi;
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fb_n->mtype = (type >> 8) & 0xff;
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fb_n->stype = type & 0xff;
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msi_get(fb_n->msi);
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fb_n->data = fb->data;
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fb_n->len = fb->len;
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fb_n->time = fb->time;
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fb_n->priv = fb->priv;
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fb_n->srcID = fb->srcID;
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fb_n->datatag = fb->datatag;
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fb_get(fb);
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fb_n->next = fb;
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}
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return fb_n;
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}
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//framebuff 引用计数减1，当计数减至0时会释放空间
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void fb_put(struct framebuff *fb)
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{
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if (fb) {
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fb_put(fb->next);
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fb_free(fb);
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}
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}
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//使用新的framebuff引用关联另1个framebuff，fb_old引用计数加1
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void fb_ref(struct framebuff *fb_new, struct framebuff *fb_old)
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{
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ASSERT(fb_new->next == NULL);
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fb_get(fb_old);
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fb_new->next = fb_old;
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}
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//获取framebuff链表中指定type的数据的第1个节点
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struct framebuff *fb_find(struct framebuff *fb, uint8 mtype, uint8 stype)
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{
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if (mtype == 0 || fb == NULL || fb->next == NULL) {
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return fb;
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}
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while (fb) {
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if (fb->mtype == mtype && (fb->stype == stype || stype == 0)) {
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return fb;
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}
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fb = fb->next;
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}
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return NULL;
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}
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//获取framebuff链表中指定type的数据的总长度
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uint32 fb_len(struct framebuff *fb, uint8 mtype, uint8 stype)
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{
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uint32 len = 0;
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if (mtype == 0 || fb == NULL) {
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return fb ? fb->len : 0;
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}
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if (fb->mtype != mtype) {
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return 0;
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}
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while (fb) {
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if (fb->mtype == mtype && (fb->stype == stype || stype == 0)) {
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len += fb->len;
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}
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fb = fb->next;
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}
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return len;
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}
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//根据fb->mtype 识别fb携带的数据为 视频，音频，图片，字幕
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MEDIA_DATA_CATEGORY fb_category(struct framebuff *fb)
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{
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if (fb->mtype < 32) { //video
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return MEDIA_DATA_VIDEO;
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} else if (fb->mtype < 64) { //audio
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return MEDIA_DATA_AUDIO;
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} else if (fb->mtype < 96) { //picture
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return MEDIA_DATA_PICTURE;
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} else if (fb->mtype < 128) { //text
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return MEDIA_DATA_TEXT;
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} else {
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return MEDIA_DATA_MAX;
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}
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}
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