/* * Copyright (c) 2010 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree.
*/
// Initialize the references to not point to any frame buffers.
memset(&cm->ref_frame_map, -1, sizeof(cm->ref_frame_map));
memset(&cm->next_ref_frame_map, -1, sizeof(cm->next_ref_frame_map));
/* TODO(jkoleszar): The decoder doesn't have any real knowledge of what the * encoder is using the frame buffers for. This is just a stub to keep the * vpxenc --test-decode functionality working, and will be replaced in a * later commit that adds VP9-specific controls for this functionality.
*/ if (ref_frame_flag == VP9_LAST_FLAG) { const YV12_BUFFER_CONFIG *const cfg = get_ref_frame(cm, 0); if (cfg == NULL) {
vpx_internal_error(&cm->error, VPX_CODEC_ERROR, "No 'last' reference frame"); return VPX_CODEC_ERROR;
} if (!equal_dimensions(cfg, sd))
vpx_internal_error(&cm->error, VPX_CODEC_ERROR, "Incorrect buffer dimensions"); else
vpx_yv12_copy_frame(cfg, sd);
} else {
vpx_internal_error(&cm->error, VPX_CODEC_ERROR, "Invalid reference frame");
}
// TODO(jkoleszar): The decoder doesn't have any real knowledge of what the // encoder is using the frame buffers for. This is just a stub to keep the // vpxenc --test-decode functionality working, and will be replaced in a // later commit that adds VP9-specific controls for this functionality. // (Yunqing) The set_reference control depends on the following setting in // encoder. // cpi->lst_fb_idx = 0; // cpi->gld_fb_idx = 1; // cpi->alt_fb_idx = 2; if (ref_frame_flag == VP9_LAST_FLAG) {
idx = cm->ref_frame_map[0];
} elseif (ref_frame_flag == VP9_GOLD_FLAG) {
idx = cm->ref_frame_map[1];
} elseif (ref_frame_flag == VP9_ALT_FLAG) {
idx = cm->ref_frame_map[2];
} else {
vpx_internal_error(&cm->error, VPX_CODEC_ERROR, "Invalid reference frame"); return cm->error.error_code;
}
/* If any buffer updating is signaled it should be done here. */ staticvoid swap_frame_buffers(VP9Decoder *pbi) { int ref_index = 0, mask;
VP9_COMMON *const cm = &pbi->common;
BufferPool *const pool = cm->buffer_pool;
RefCntBuffer *const frame_bufs = cm->buffer_pool->frame_bufs;
for (mask = pbi->refresh_frame_flags; mask; mask >>= 1) { constint old_idx = cm->ref_frame_map[ref_index]; // Current thread releases the holding of reference frame.
decrease_ref_count(old_idx, frame_bufs, pool);
// Release the reference frame in reference map. if (mask & 1) {
decrease_ref_count(old_idx, frame_bufs, pool);
}
cm->ref_frame_map[ref_index] = cm->next_ref_frame_map[ref_index];
++ref_index;
}
// Current thread releases the holding of reference frame. for (; ref_index < REF_FRAMES && !cm->show_existing_frame; ++ref_index) { constint old_idx = cm->ref_frame_map[ref_index];
decrease_ref_count(old_idx, frame_bufs, pool);
cm->ref_frame_map[ref_index] = cm->next_ref_frame_map[ref_index];
}
pbi->hold_ref_buf = 0;
cm->frame_to_show = get_frame_new_buffer(cm);
--frame_bufs[cm->new_fb_idx].ref_count;
// Invalidate these references until the next frame starts. for (ref_index = 0; ref_index < 3; ref_index++)
cm->frame_refs[ref_index].idx = -1;
}
staticvoid release_fb_on_decoder_exit(VP9Decoder *pbi) { const VPxWorkerInterface *const winterface = vpx_get_worker_interface();
VP9_COMMON *volatileconst cm = &pbi->common;
BufferPool *volatileconst pool = cm->buffer_pool;
RefCntBuffer *volatileconst frame_bufs = cm->buffer_pool->frame_bufs; int i;
// Synchronize all threads immediately as a subsequent decode call may // cause a resize invalidating some allocations.
winterface->sync(&pbi->lf_worker); for (i = 0; i < pbi->num_tile_workers; ++i) {
winterface->sync(&pbi->tile_workers[i]);
}
// Release all the reference buffers if worker thread is holding them. if (pbi->hold_ref_buf == 1) { int ref_index = 0, mask; for (mask = pbi->refresh_frame_flags; mask; mask >>= 1) { constint old_idx = cm->ref_frame_map[ref_index]; // Current thread releases the holding of reference frame.
decrease_ref_count(old_idx, frame_bufs, pool);
// Release the reference frame in reference map. if (mask & 1) {
decrease_ref_count(old_idx, frame_bufs, pool);
}
++ref_index;
}
// Current thread releases the holding of reference frame. for (; ref_index < REF_FRAMES && !cm->show_existing_frame; ++ref_index) { constint old_idx = cm->ref_frame_map[ref_index];
decrease_ref_count(old_idx, frame_bufs, pool);
}
pbi->hold_ref_buf = 0;
}
}
int vp9_receive_compressed_data(VP9Decoder *pbi, size_t size, const uint8_t **psource) {
VP9_COMMON *volatileconst cm = &pbi->common;
BufferPool *volatileconst pool = cm->buffer_pool;
RefCntBuffer *volatileconst frame_bufs = cm->buffer_pool->frame_bufs; const uint8_t *source = *psource; int retcode = 0;
cm->error.error_code = VPX_CODEC_OK;
if (size == 0) { // This is used to signal that we are missing frames. // We do not know if the missing frame(s) was supposed to update // any of the reference buffers, but we act conservative and // mark only the last buffer as corrupted. // // TODO(jkoleszar): Error concealment is undefined and non-normative // at this point, but if it becomes so, [0] may not always be the correct // thing to do here. if (cm->frame_refs[0].idx > 0) {
assert(cm->frame_refs[0].buf != NULL);
cm->frame_refs[0].buf->corrupted = 1;
}
}
pbi->ready_for_new_data = 0;
// Check if the previous frame was a frame without any references to it. if (cm->new_fb_idx >= 0 && frame_bufs[cm->new_fb_idx].ref_count == 0 &&
!frame_bufs[cm->new_fb_idx].released) {
pool->release_fb_cb(pool->cb_priv,
&frame_bufs[cm->new_fb_idx].raw_frame_buffer);
frame_bufs[cm->new_fb_idx].released = 1;
}
// Find a free frame buffer. Return error if can not find any.
cm->new_fb_idx = get_free_fb(cm); if (cm->new_fb_idx == INVALID_IDX) {
pbi->ready_for_new_data = 1;
release_fb_on_decoder_exit(pbi);
vpx_clear_system_state();
vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR, "Unable to find free frame buffer"); return cm->error.error_code;
}
// Assign a MV array to the frame buffer.
cm->cur_frame = &pool->frame_bufs[cm->new_fb_idx];
if (!cm->show_existing_frame) {
cm->last_show_frame = cm->show_frame;
cm->prev_frame = cm->cur_frame; if (cm->seg.enabled) vp9_swap_current_and_last_seg_map(cm);
}
if (cm->show_frame) cm->cur_show_frame_fb_idx = cm->new_fb_idx;
// Update progress in frame parallel decode.
cm->last_width = cm->width;
cm->last_height = cm->height; if (cm->show_frame) {
cm->current_video_frame++;
}
cm->error.setjmp = 0; return retcode;
}
int vp9_get_raw_frame(VP9Decoder *pbi, YV12_BUFFER_CONFIG *sd,
vp9_ppflags_t *flags) {
VP9_COMMON *const cm = &pbi->common; int ret = -1; #if !CONFIG_VP9_POSTPROC
(void)*flags; #endif
if (pbi->ready_for_new_data == 1) return ret;
pbi->ready_for_new_data = 1;
/* no raw frame to show!!! */ if (!cm->show_frame) return ret;
pbi->ready_for_new_data = 1;
#if CONFIG_VP9_POSTPROC if (!cm->show_existing_frame) {
ret = vp9_post_proc_frame(cm, sd, flags, cm->width);
} else {
*sd = *cm->frame_to_show;
ret = 0;
} #else
*sd = *cm->frame_to_show;
ret = 0; #endif/*!CONFIG_POSTPROC*/
vpx_clear_system_state(); return ret;
}
vpx_codec_err_t vp9_parse_superframe_index(const uint8_t *data, size_t data_sz,
uint32_t sizes[8], int *count,
vpx_decrypt_cb decrypt_cb, void *decrypt_state) { // A chunk ending with a byte matching 0xc0 is an invalid chunk unless // it is a super frame index. If the last byte of real video compression // data is 0xc0 the encoder must add a 0 byte. If we have the marker but // not the associated matching marker byte at the front of the index we have // an invalid bitstream and need to return an error.
// This chunk is marked as having a superframe index but doesn't have // enough data for it, thus it's an invalid superframe index. if (data_sz < index_sz) return VPX_CODEC_CORRUPT_FRAME;
// This chunk is marked as having a superframe index but doesn't have // the matching marker byte at the front of the index therefore it's an // invalid chunk. if (marker != marker2) return VPX_CODEC_CORRUPT_FRAME;
}
{ // Found a valid superframe index.
uint32_t i, j; const uint8_t *x = &data[data_sz - index_sz + 1];
// Frames has a maximum of 8 and mag has a maximum of 4.
uint8_t clear_buffer[32];
assert(sizeof(clear_buffer) >= frames * mag); if (decrypt_cb) {
decrypt_cb(decrypt_state, x, clear_buffer, frames * mag);
x = clear_buffer;
}
for (i = 0; i < frames; ++i) {
uint32_t this_sz = 0;
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